Iowa Counties

The first two Iowa Counties were formed when Iowa was still part of Michigan Territory. In 1836 a part of Michigan Territory was formed into Wisconsin Territory. In 1838 Iowa territory was organized from the western portion of Wisconsin Territory. On December 28, 1846, Iowa entered the Union as the 29th state. On January 15, 1851, 49 counties of Iowa were created. The day is one of the most significant days in Iowa county history. Some counties of Iowa no longer exist because they were discontinued, renamed or merged with another county. Iowa State has many box counties as the vast majority of counties were formed by lines of the survey instead of natural means.

How Many Counties in Iowa

The US state of Iowa is divided into 99 counties. Check this Iowa County Map which provides the location of all counties on the Iowa Map.

Counties of Iowa

• Adair County Map, Iowa
• Adams County Map, Iowa
• Allamakee County Map, Iowa
• Appanoose County Map, Iowa
• Audubon County Map, Iowa
• Benton County Map, Iowa
• Black Hawk County Map, Iowa
• Boone County Map, Iowa
• Bremer County Map, Iowa
• Buchanan County Map, Iowa
• Buena Vista County Map, Iowa
• Butler County Map, Iowa
• Calhoun County Map, Iowa
• Carroll County Map, Iowa
• Cass County Map, Iowa
• Cedar County Map, Iowa
• Cerro Gordo County Map, Iowa
• Cherokee County Map, Iowa
• Chickasaw County Map, Iowa
• Clarke County Map, Iowa
• Clay County Map, Iowa
• Clayton County Map, Iowa
• Clinton County Map, Iowa
• Crawford County Map, Iowa
• Dallas County Map, Iowa
• Davis County Map, Iowa
• Decatur County Map, Iowa
• Delaware County Map, Iowa
• Des Moines County Map, Iowa
• Dickinson County Map, Iowa
• Dubuque County Map, Iowa
• Emmet County Map, Iowa
• Fayette County Map, Iowa
• Floyd County Map, Iowa
• Franklin County Map, Iowa
• Fremont County Map, Iowa
• Greene County Map, Iowa
• Grundy County Map, Iowa
• Guthrie County Map, Iowa
• Hamilton County Map, Iowa
• Hancock County Map, Iowa
• Hardin County Map, Iowa
• Harrison County Map, Iowa
• Henry County Map, Iowa
• Howard County Map, Iowa
• Humboldt County Map, Iowa
• Ida County Map, Iowa
• Iowa County Map, Iowa
• Jackson County Map, Iowa
• Jasper County Map, Iowa
• Jefferson County Map, Iowa
• Johnson County Map, Iowa
• Jones County Map, Iowa
• Keokuk County Map, Iowa
• Kossuth County Map, Iowa
• Lee County Map, Iowa
• Linn County Map, Iowa
• Louisa County Map, Iowa
• Lucas County Map, Iowa
• Lyon County Map, Iowa
• Madison County Map, Iowa
• Mahaska County Map, Iowa
• Marion County Map, Iowa
• Marshall County Map, Iowa
• Mills County Map, Iowa
• Mitchell County Map, Iowa
• Monona County Map, Iowa
• Monroe County Map, Iowa
• Montgomery County Map, Iowa
• Muscatine County Map, Iowa
• O’Brien County Map, Iowa
• Osceola County Map, Iowa
• Page County Map, Iowa
• Palo Alto County Map, Iowa
• Plymouth County Map, Iowa
• Pocahontas County Map, Iowa
• Polk County Map, Iowa
• Pottawattamie County Map, Iowa
• Poweshiek County Map, Iowa
• Ringgold County Map, Iowa
• Sac County Map, Iowa
• Scott County Map, Iowa
• Shelby County Map, Iowa
• Sioux County Map, Iowa
• Story County Map, Iowa
• Tama County Map, Iowa
• Taylor County Map, Iowa
• Union County Map, Iowa
• Van Buren County Map, Iowa
• Wapello County Map, Iowa
• Warren County Map, Iowa
• Washington County Map, Iowa
• Wayne County Map, Iowa
• Webster County Map, Iowa
• Winnebago County Map, Iowa
• Winneshiek County Map, Iowa
• Woodbury County Map, Iowa
• Worth County Map, Iowa
• Wright County Map, Iowa

Oldest and Newest Counties of Iowa

The oldest and first two counties of Iowa were created on September 6, 1834, were Des Moines County and Dubuque County. The Newest and last County of Iowa state created on February 26, 1857, is Humboldt County.

Largest and Smallest County by Area in Iowa

Kossuth County is the largest county in Iowa, covering an area of 973 square miles (2520 km2). The smallest county of  Iowa is Dickinson county, covering 381 square miles (990 km2).

Best County to Live in Iowa

Some of the best counties to live in the Iowa State of United States are Dallas County, Johnson County,  Story County, Polk County, Sioux County and Dubuque County.

Most Populated and Least Populated County of Iowa

Polk County is the most populated county (2020 census) in Iowa, and Adams County is the least populated county (2020 census) in Iowa state of the United States.

Information about maps of all Counties of Iowa

The maps of all counties of Iowa are available on the website describing facts about counties. The map shows the location of the county within the state, its county seat, and state and county boundary. These maps can be used in multiple ways for various purposes.