[3] The Northern District of Iowa has four court divisions, each covering the following counties: The Cedar Rapids Division, covering Benton, Cedar, Grundy, Hardin, Iowa, Jones, Linn, and Tama counties.

The Central Division, covering Butler, Calhoun, Carroll, Cerro Gordo, Emmet, Franklin, Hamilton, Hancock, Humboldt, Kossuth, Palo Alto, Pocahontas, Webster, Winnebago, Worth, and Wright counties.

The Eastern Division, covering Allamakee, Black Hawk, Bremer, Buchanan, Chickasaw, Clayton, Delaware, Dubuque, Fayette, Floyd, Howard, Jackson, Mitchell, and Winneshiek counties.

The Western Division, covering Buena Vista, Cherokee, Clay, Crawford, Dickinson, Ida, Lyon, Monona, O'Brien, Osceola, Plymouth, Sac, Sioux, and Woodbury counties.

As of February 12, 2024[update]: Chief judges have administrative responsibilities with respect to their district court.