| Documentation: | Census 2010 |
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Publisher: U.S. Census Bureau
Survey: Census 2010
| Document: | Summary File 1 Technical Documentation |
| citation: | Social Explorer, U.S. Census Bureau; 2010 Census of Population and Housing, Summary File 1: Technical Documentation, Issued June 2011. |
Chapter Contents
Summary File 1 Technical Documentation
For the 2010 Census, the U.S. Census Bureau is committed to counting every person. Just as important, however, is the Census Bureau's commitment to counting every person in the correct place. The fundamental reason the decennial census is conducted is to fulfill the constitutional requirement (Article I, Section 2) to apportion the seats in the U.S. House of Representatives among the states. Thus, for a fair and equitable apportionment, it is crucial that people are counted in the right place during the 2010 Census.
Planners of the first U.S. decennial census in 1790 established the concept of "usual residence" as the main principle in determining where people were to be counted. This concept has been followed in all subsequent censuses and is the guiding principle for the 2010 Census. Usual residence is defined as the place where a person lives and sleeps most of the time. This place is not necessarily the same as the person's voting residence or legal residence.
Determining usual residence is easy for most people. Given our nation's wide diversity in types of living arrangements, however, the usual residence for some people is not as apparent. A few examples are people experiencing homelessness, snowbirds, children in shared custody arrangements, college students, live-in employees, military personnel, and people who live in workers' dormitories.
Applying the usual residence concept to real living situations means that people will not always be counted at the place where they happen to be staying on Thursday, April 1, 2010 (Census Day). For example, people who are away from their usual residence while on vacation or on a business trip on Census Day should be counted at their usual residence. People who live at more than one residence during the week, month, or year should be counted at the place where they live most of the time. People without a usual residence, however, should be counted where they are staying on Census Day.
Determining usual residence is easy for most people. Given our nation's wide diversity in types of living arrangements, however, the usual residence for some people is not as apparent. A few examples are people experiencing homelessness, snowbirds, children in shared custody arrangements, college students, live-in employees, military personnel, and people who live in workers' dormitories.
Applying the usual residence concept to real living situations means that people will not always be counted at the place where they happen to be staying on Thursday, April 1, 2010 (Census Day). For example, people who are away from their usual residence while on vacation or on a business trip on Census Day should be counted at their usual residence. People who live at more than one residence during the week, month, or year should be counted at the place where they live most of the time. People without a usual residence, however, should be counted where they are staying on Census Day.
The residence rule is used to determine where people should be counted in the United States during the 2010 Census. The rule says:
Count people at their usual residence, which is the place where they live and sleep most of the time.
People in certain types of facilities or shelters (i.e., places where groups of people live together) on Census Day should be counted at the facility or shelter.
People who do not have a usual residence, or cannot determine a usual residence, should be counted where they are on Census Day.
This residence rule also is used to determine where people are counted in the 2010 Census of Puerto Rico.
The following sections describe how the residence rule applies for people in various living situations.
Count people at their usual residence, which is the place where they live and sleep most of the time.
People in certain types of facilities or shelters (i.e., places where groups of people live together) on Census Day should be counted at the facility or shelter.
People who do not have a usual residence, or cannot determine a usual residence, should be counted where they are on Census Day.
This residence rule also is used to determine where people are counted in the 2010 Census of Puerto Rico.
The following sections describe how the residence rule applies for people in various living situations.
People away from their usual residence on Thursday, April 1, 2010 (Census Day), such as on a vacation or a business trip, visiting, traveling outside the United States, or working elsewhere without a usual residence there (for example, as a truck driver or traveling salesperson)-Counted at the residence where they live and sleep most of the time.
Visitors on Thursday, April 1, 2010 (Census Day) who will return to their usual residence-Counted at the residence where they live and sleep most of the time.
Citizens of foreign countries who are visiting the United States on Thursday, April 1, 2010 (Census Day), such as on a vacation or a business trip-Not counted in the census.
Citizens of foreign countries who are visiting the United States on Thursday, April 1, 2010 (Census Day), such as on a vacation or a business trip-Not counted in the census.
People living away most of the time while working, such as people who live at a residence close to where they work and return regularly to another residence-Counted at the residence where they live and sleep most of the time. If there is no residence where they live and sleep most of the time, they are counted where they live and sleep more than anywhere else. If time is equally divided, or if usual residence cannot be determined, they are counted at the residence where they are staying on Thursday, April 1, 2010 (Census Day).
People who live at two or more residences (during the week, month, or year), such as people who travel seasonally between residences (for example, snowbirds)-Counted at the residence where they live and sleep most of the time. If there is no residence where they live and sleep most of the time, they are counted where they live and sleep more than anywhere else. If time is equally divided, or if usual residence cannot be determined, they are counted at the residence where they are staying on Thursday, April 1, 2010 (Census Day).Children in shared custody or other arrangements who live at more than one residence-Counted at the residence where they live and sleep most of the time. If time is equally divided, they are counted at the residence where they are staying on Thursday, April 1, 2010 (Census Day).
People who live at two or more residences (during the week, month, or year), such as people who travel seasonally between residences (for example, snowbirds)-Counted at the residence where they live and sleep most of the time. If there is no residence where they live and sleep most of the time, they are counted where they live and sleep more than anywhere else. If time is equally divided, or if usual residence cannot be determined, they are counted at the residence where they are staying on Thursday, April 1, 2010 (Census Day).Children in shared custody or other arrangements who live at more than one residence-Counted at the residence where they live and sleep most of the time. If time is equally divided, they are counted at the residence where they are staying on Thursday, April 1, 2010 (Census Day).
People who cannot determine a usual residence-Counted where they are staying on Thursday, April 1, 2010 (Census Day).
People at soup kitchens and regularly scheduled mobile food vans-Counted at the residence where they live and sleep most of the time. If they do not have a place they live and sleep most of the time, they are counted at the soup kitchen or mobile food van location where they are on Thursday, April 1, 2010 (Census Day).
People at targeted non-sheltered outdoor locations-Counted at the outdoor location where people experiencing homelessness stay without paying.
People at soup kitchens and regularly scheduled mobile food vans-Counted at the residence where they live and sleep most of the time. If they do not have a place they live and sleep most of the time, they are counted at the soup kitchen or mobile food van location where they are on Thursday, April 1, 2010 (Census Day).
People at targeted non-sheltered outdoor locations-Counted at the outdoor location where people experiencing homelessness stay without paying.
Boarding school students living away from their parental home while attending boarding school below the college level, including Bureau of Indian Affairs boarding schools-Counted at their parental home rather than at the boarding school.
College students living at their parental home while attending college-Counted at their parental home.
College students living away from their parental home while attending college in the United States (living either on-campus or off-campus)-Counted at the on-campus or off-campus residence where they live and sleep most of the time.
College students living away from their parental home while attending college in the United States (living either on-campus or off-campus) but staying at their parental home while on break or vacation-Counted at the on-campus or off-campus residence where they live and sleep most of the time.
U.S. college students living outside the United States while attending college outside the United States-Not counted in the census.
Foreign students living in the United States while attending college in the United States (living either on-campus or off-campus)-Counted at the on-campus or off-campus residence where they live and sleep most of the time.
College students living at their parental home while attending college-Counted at their parental home.
College students living away from their parental home while attending college in the United States (living either on-campus or off-campus)-Counted at the on-campus or off-campus residence where they live and sleep most of the time.
College students living away from their parental home while attending college in the United States (living either on-campus or off-campus) but staying at their parental home while on break or vacation-Counted at the on-campus or off-campus residence where they live and sleep most of the time.
U.S. college students living outside the United States while attending college outside the United States-Not counted in the census.
Foreign students living in the United States while attending college in the United States (living either on-campus or off-campus)-Counted at the on-campus or off-campus residence where they live and sleep most of the time.
People who move into a residence on Thursday, April 1, 2010 (Census Day) who have not been listed on a questionnaire for any residence-Counted at the residence they move into on Census Day.
People who move out of a residence on Thursday, April 1, 2010 (Census Day) and have not moved into a new residence on Thursday, April 1, 2010 (Census Day) and who have not been listed on a questionnaire for any residence-Counted at the residence from which they moved.
People who move out of a residence or move into a residence on Thursday, April 1, 2010 (Census Day) who have already been listed on a questionnaire for any residence-If they have already been listed on one questionnaire, do not list them on any other questionnaire.
People who move out of a residence on Thursday, April 1, 2010 (Census Day) and have not moved into a new residence on Thursday, April 1, 2010 (Census Day) and who have not been listed on a questionnaire for any residence-Counted at the residence from which they moved.
People who move out of a residence or move into a residence on Thursday, April 1, 2010 (Census Day) who have already been listed on a questionnaire for any residence-If they have already been listed on one questionnaire, do not list them on any other questionnaire.
Babies born on or before 11:59:59 p.m. on Thursday, April 1, 2010 (Census Day)-Counted at the residence where they will live and sleep most of the time, even if they are still in the hospital on April 1, 2010 (Census Day).
Babies born after 11:59:59 p.m. on Thursday, April 1, 2010 (Census Day)-Not counted in the census. Residence Rule & Residence Situations for the 2010 Census of the United States
People who die before Thursday, April I, 2010 (Census Day)-Not counted in the census.
People who die on Thursday, April 1, 2010 (Census Day)-Counted in the census if they are alive at any time on April 1, 2010.
Babies born after 11:59:59 p.m. on Thursday, April 1, 2010 (Census Day)-Not counted in the census. Residence Rule & Residence Situations for the 2010 Census of the United States
People who die before Thursday, April I, 2010 (Census Day)-Not counted in the census.
People who die on Thursday, April 1, 2010 (Census Day)-Counted in the census if they are alive at any time on April 1, 2010.
Roomers or boarders-Counted at the residence where they live and sleep most of the time.
Housemates or roommates-Counted at the residence where they live and sleep most of the time.
Unmarried partners-Counted at the residence where they live and sleep most of the time.
Foster children or foster adults-Counted at the residence where they live and sleep most of the time.
Live-in employees, such as caregivers or domestic workers-Counted at the residence where they live and sleep most of the time.
Housemates or roommates-Counted at the residence where they live and sleep most of the time.
Unmarried partners-Counted at the residence where they live and sleep most of the time.
Foster children or foster adults-Counted at the residence where they live and sleep most of the time.
Live-in employees, such as caregivers or domestic workers-Counted at the residence where they live and sleep most of the time.
U.S. military personnel living in military barracks in the United States-Counted at the military barracks.
U.S. military personnel living in the United States (living either on base or off base) but not in barracks- Counted at the residence where they live and sleep most of the time.
U.S. military personnel on U.S. military vessels with a U.S. homeport-Counted at the onshore U.S. residence where they live and sleep most of the time. If they have no onshore U.S. residence, they are counted at their vessel's homeport.
People in military disciplinary barracks and jails in the United States-Counted at the facility.
People in military treatment facilities with assigned active duty patients in the United States-Counted at the facility if they are assigned there.
U.S. military personnel living on or off a military installation outside the United States, including dependents living with them-Counted as part of the U.S. overseas population. They should not be included on any U.S. census questionnaire.
U.S. military personnel on U.S. military vessels with a homeport outside the United States-Counted as part of the U.S. overseas population. They should not be included on any U.S. census questionnaire.
U.S. military personnel living in the United States (living either on base or off base) but not in barracks- Counted at the residence where they live and sleep most of the time.
U.S. military personnel on U.S. military vessels with a U.S. homeport-Counted at the onshore U.S. residence where they live and sleep most of the time. If they have no onshore U.S. residence, they are counted at their vessel's homeport.
People in military disciplinary barracks and jails in the United States-Counted at the facility.
People in military treatment facilities with assigned active duty patients in the United States-Counted at the facility if they are assigned there.
U.S. military personnel living on or off a military installation outside the United States, including dependents living with them-Counted as part of the U.S. overseas population. They should not be included on any U.S. census questionnaire.
U.S. military personnel on U.S. military vessels with a homeport outside the United States-Counted as part of the U.S. overseas population. They should not be included on any U.S. census questionnaire.
Crews of U.S. flag maritime/merchant vessels docked in a U.S. port or sailing from one U.S. port to another U.S. port on Thursday, April 1, 2010 (Census Day)-Counted at the onshore U.S. residence where they live and sleep most of the time. If they have no onshore U.S. residence, they are counted at their vessel. If the vessel is docked in a U.S. port, crewmembers with no onshore U.S. residence are counted at the port. If the vessel is sailing from one U.S. port to another U.S. port, crewmembers with no onshore U.S. residence are counted at the port of departure.
Crews of U.S. flag maritime/merchant vessels engaged in U.S. inland waterway transportation on Thursday, April 1, 2010 (Census Day)-Counted at the onshore residence where they live and sleep most of the time.
Crews of U.S. flag maritime/merchant vessels docked in a foreign port, sailing from one foreign port to another foreign port, sailing from a U.S. port to a foreign port, or sailing from a foreign port to a U.S. port on Thursday, April 1, 2010 (Census Day)-Not counted in the census.
Crews of U.S. flag maritime/merchant vessels engaged in U.S. inland waterway transportation on Thursday, April 1, 2010 (Census Day)-Counted at the onshore residence where they live and sleep most of the time.
Crews of U.S. flag maritime/merchant vessels docked in a foreign port, sailing from one foreign port to another foreign port, sailing from a U.S. port to a foreign port, or sailing from a foreign port to a U.S. port on Thursday, April 1, 2010 (Census Day)-Not counted in the census.
Citizens of foreign countries living in the United States-Counted at the U.S. residence where they live and sleep most of the time.
Citizens of foreign countries living in the United States who are members of the diplomatic community- Counted at the embassy, consulate, United Nations' facility, or other residences where diplomats live.
Citizens of foreign countries visiting the United States, such as on a vacation or business trip-Not counted in the census.
Citizens of foreign countries living in the United States who are members of the diplomatic community- Counted at the embassy, consulate, United Nations' facility, or other residences where diplomats live.
Citizens of foreign countries visiting the United States, such as on a vacation or business trip-Not counted in the census.
U.S. citizens living outside the United States who are employed as civilians by the U.S. government, including dependents living with them-Counted as part of the U.S. overseas population. They should not be included on any U.S. census questionnaire.
U.S. citizens living outside the United States who are not employed by the U.S. government, including dependents living with them-Not counted in the census.
U.S. military personnel living on or off a military installation outside the United States, including dependents living with them-Counted as part of the U.S. overseas population. They should not be included on any U.S. census questionnaire.
U.S. military personnel on U.S. military vessels with a homeport outside the United States-Counted as part of the U.S. overseas population. They should not be included on any U.S. census questionnaire.
U.S. citizens living outside the United States who are not employed by the U.S. government, including dependents living with them-Not counted in the census.
U.S. military personnel living on or off a military installation outside the United States, including dependents living with them-Counted as part of the U.S. overseas population. They should not be included on any U.S. census questionnaire.
U.S. military personnel on U.S. military vessels with a homeport outside the United States-Counted as part of the U.S. overseas population. They should not be included on any U.S. census questionnaire.
People in correctional residential facilities on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in federal detention centers on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in federal and state prisons on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in local jails and other municipal confinement facilities on Thursday, April 1, 2010 (Census Day)- Counted at the facility.
People in federal detention centers on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in federal and state prisons on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in local jails and other municipal confinement facilities on Thursday, April 1, 2010 (Census Day)- Counted at the facility.
People in group homes intended for adults (non-correctional)-Counted at the facility.
People in residential treatment centers for adults (non-correctional)-Counted at the residence where they live and sleep most of the time. If they do not have a residence where they live and sleep most of the time, they are counted at the facility.
People in residential treatment centers for adults (non-correctional)-Counted at the residence where they live and sleep most of the time. If they do not have a residence where they live and sleep most of the time, they are counted at the facility.
Patients in general or Veterans Affairs hospitals (except psychiatric units) on Thursday, April 1, 2010 (Census Day), including newborn babies still in the hospital on Census Day-Counted at the residence where they live and sleep most of the time. Newborn babies should be counted at the residence where they will live and sleep most of the time.
People in hospitals on Thursday, April 1, 2010 (Census Day) who have no usual home elsewhere-Counted at the facility.
People staying in in-patient hospice facilities on Thursday, April 1, 2010 (Census Day)-Counted at the residence where they live and sleep most of the time. If they do not have a residence where they live and sleep most of the time, they are counted at the facility.
People in mental (psychiatric) hospitals and psychiatric units for long-term non-acute care in other hospitals on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in nursing facilities/skilled nursing facilities on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in hospitals on Thursday, April 1, 2010 (Census Day) who have no usual home elsewhere-Counted at the facility.
People staying in in-patient hospice facilities on Thursday, April 1, 2010 (Census Day)-Counted at the residence where they live and sleep most of the time. If they do not have a residence where they live and sleep most of the time, they are counted at the facility.
People in mental (psychiatric) hospitals and psychiatric units for long-term non-acute care in other hospitals on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in nursing facilities/skilled nursing facilities on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in correctional facilities intended for juveniles on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in group homes for juveniles (non-correctional) on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in residential treatment centers for juveniles (non-correctional) on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in group homes for juveniles (non-correctional) on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in residential treatment centers for juveniles (non-correctional) on Thursday, April 1, 2010 (Census Day)-Counted at the facility.
People in college/university student housing-Counted at the college/university student housing.
Boarding school students living away from their parental home while attending boarding school below the college level, including Bureau of Indian Affairs boarding schools-Counted at their parental home rather than at the boarding school.
People in residential schools for people with disabilities on Thursday, April 1, 2010 (Census Day)-Counted at the school.
Boarding school students living away from their parental home while attending boarding school below the college level, including Bureau of Indian Affairs boarding schools-Counted at their parental home rather than at the boarding school.
People in residential schools for people with disabilities on Thursday, April 1, 2010 (Census Day)-Counted at the school.
People in emergency and transitional shelters (with sleeping facilities) on Thursday, April 1, 2010 (Census Day) for people experiencing homelessness-Counted at the shelter.
People in living quarters for victims of natural disasters-Counted at the residence where they live and sleep most of the time. If they do not have a residence where they live and sleep most of the time, they are counted at the facility.
People in domestic violence shelters on Thursday, April 1, 2010 (Census Day)-Counted at the shelter.
People in living quarters for victims of natural disasters-Counted at the residence where they live and sleep most of the time. If they do not have a residence where they live and sleep most of the time, they are counted at the facility.
People in domestic violence shelters on Thursday, April 1, 2010 (Census Day)-Counted at the shelter.
People at transitory locations, such as recreational vehicle (RV) parks, campgrounds, hotels and motels (including those on military sites), hostels, marinas, racetracks, circuses, or carnivals-Counted at the residence where they live and sleep most of the time. If there is no residence where they live and sleep most of the time, they are counted where they live and sleep more than anywhere else. If time is equally divided, or if usual residence cannot be determined, they are counted at the place where they are staying on Thursday, April 1, 2010 (Census Day).
People in religious group quarters, such as convents and monasteries-Counted at the residence where they live and sleep most of the time. If they do not have a residence where they live and sleep most of the time, they are counted at the facility.
