2010 Census Block Group Data Now Available on Social Explorer by Sydney Beveridge
In addition to offering nationwide census tract data for the 2010 census, Social Explorer now offers 2010 block group data.
Block groups are smaller than census tracts–with about three block groups per tract–enabling users to access a new level of detailed information.
As an example, here you can see 2010 vacancy rates in the West Village of Manhattan at the tract level:
And the block group level: