Actually, every American town founded before 1950 had a train line going through it. Aside from people living on homesteads, and maybe some small antebellum towns, everybody lived in close distance to a train station before they were shut down and torn up.

Worth noting that this map is for passenger rail only. The cargo rail network is much bigger. Basically, this map shows whereever Amtrak runs, where as before the introduction of massively subsidized interstates in the US in 1956, every cargo rail company also ran profitable passenger rail traffic on a massive network that became today's cargo lines.

The cargo companies dumped their traffic onto the federal government in the 70s and have also ran massive cost cutting programs since, tearing up hundreds of thousands of miles of rail.

https://en.wikipedia.org/wiki/History_of_rail_transportation_in_the_United_States