If you talk small Iowa towns you have to throw Beaconsfield, IA in there. For being so small it has a decent amount of history. The first Hy-vee store was there, it is also the hometown of astronaut Peggy Whitson.
My dad's old deer hunting group used to run deer right through the middle of the town.
Beaconsfield, Iowa - Wikipedia, the free encyclopedia
And while we're at it I might as well throw in the other towns in Ringgold country.
Tingley, Ellston, Benton, Delphos, Maloy, Redding... all really small towns, Tingley the biggest with like 150 people. The rest are easily under 75.
I suppose Kellerton is to big, I remember go through it the way to wrestle at Mount Ayr.