May 22, 2014: The brick Irwin school was built in 1917. Note the stonework.
There are only 10 incorporated places in Iowa starting with I, but four county seats among them. Five have a population under 1000.
Irwin is one of the relatively few Iowa towns without a high school whose town name starts a district, IKM and now IKM-Manning. Irwin’s original school building is entirely separate from a 1960s building that is still in use for preschoolers to third-graders.