Interactive singles map of the US. There are sliders so you can narrow the age range, and choose your span. It does not adjust for singles in relationships. No, it doesn’t go under 18, you perverts.
[T]he only two places with a surplus of women in the 20-29 age bracket are New Orleans, LA and Springfield, MA? Lynchburg, VA pops up, too, if you lower the minimum required population.