You can look up nationwide information on the 55.6 million available men and 63.5 million available women, or take a lesson from "The Situation," and analyze the ratio of single women to single men to plan your next night out.
You can use tables like the 2005-09 American Community Survey's "Sex By Marital Status By Age For The Population 15 Years And Over" to hone in on where your future honey may (or may not) dwell.
Check out Social Explorer's maps and reports for more information on singles. It's not just a coincidence that "data" is just one letter away from "date." And you will be sure to impress with a demographics-related pickup line.
Happy Valentine's Day from Social Explorer!