Iowa Counties: History and Information

Focused on the histories of Iowa counties

Iowa is a state in the Midwestern region of the United States of America. It is the 29th state of the United States, having joined the Union on December 28, 1846. The state is named for the Ioway people, a Siouan tribe of Native Americans that formerly lived there.

There are 99 counties in the state of Iowa. The first two counties, Des Moines County and Dubuque County, were created in 1834 when Iowa was still part of the Michigan Territory. In preparation for Michigan's statehood, part of Michigan Territory was formed into Wisconsin Territory in 1836. Two years later, the western portion was split off to become Iowa Territory. The south-eastern part of Iowa Territory became Iowa, the 29th state in the union, on 28 December 1846, by which point 44 counties had been created. Counties continued to be created by the state government until 1857, when the last county, Humboldt County, was created. One of the most significant days in Iowa county history was January 15, 1851, on which 49 counties were created.