Millville, the ninth-smallest town in Iowa in 2010, has lost a third of its population of 30 since the census. It’s going to disincorporate, following Mount Sterling, formerly the 14th-smallest town in Iowa. Searsboro tried but the state wouldn’t allow it.
It only has a few streets (PDF), and Main Street consists of disjointed sections of old US 52.
Should the process be finalized, Iowa will be left with 945 incorporated places.