I live in a town of 60,000 and it's not in the selection. Some available selections are not actually towns but are sections of towns. Where I live there are multiple post offices. People in Plantsville get insulted if you say they live in Southington.
Like Brooklyn has a Red Hook section. I don't know where the devs get their information from. I certainly can't blame them for not including every little town in their data. But larger towns s/b included.
When choosing the weather for a stadium there is a Blue Hill in Massachusetts. I can't find any reference to this town using Google.