UPDATED POST: Maptech used to host the collection of Historical USGS topographic map collection that was started by rail historian Chris Marshall, but apparently it does not appear to do so anymore.

USGS’s collection of historical maps is one of my favorite resources for old USGS topographic maps.

It’s a bit tricky to use. All the scanned maps are in quarters. I usually start with the town index (not the quad index) and work my way through the four quarters of the quad map until I find the area I’m interested in. Buildings, schools, and churches are indicated.