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- Jack Creek Township, Emmet County
- Jackson Township, Adair County
- Jackson Township, Benton County
- Jackson Township, Boone County
- Jackson Township, Bremer County
- Jackson Township, Butler County
- Jackson Township, Calhoun County
- Jackson Township, Clarke County
- Jackson Township, Crawford County
- Jackson Township, Des Moines County
- Jackson Township, Greene County
- Jackson Township, Guthrie County
- Jackson Township, Hardin County
- Jackson Township, Harrison County
- Jackson Township, Henry County
- Jackson Township, Jackson County
- Jackson Township, Jones County
- Jackson Township, Keokuk County
- Jackson Township, Lee County
- Jackson Township, Linn County
- Jackson Township, Lucas County
- Jackson Township, Madison County
- Jackson Township, Monroe County
- Jackson Township, Poweshiek County
- Jackson Township, Sac County
- Jackson Township, Shelby County
- Jackson Township, Taylor County
- Jackson Township, Van Buren County
- Jackson Township, Warren County
- Jackson Township, Washington County
- Jackson Township, Wayne County
- Jackson Township, Webster County
- Jackson Township, Winneshiek County
- Jacksonville Township, Chickasaw County
- James Township, Pottawattamie County
- Jamestown Township, Howard County
- Jasper Township, Adams County
- Jasper Township, Carroll County
- Jefferson Township, Adair County
- Jefferson Township, Allamakee County
- Jefferson Township, Bremer County
- Jefferson Township, Buchanan County
- Jefferson Township, Butler County
- Jefferson Township, Clayton County
- Jefferson Township, Dubuque County
- Jefferson Township, Fayette County
- Jefferson Township, Harrison County
- Jefferson Township, Henry County
- Jefferson Township, Johnson County
- Jefferson Township, Lee County
- Jefferson Township, Louisa County
- Jefferson Township, Madison County
- Jefferson Township, Mahaska County
- Jefferson Township, Marshall County
- Jefferson Township, Polk County
- Jefferson Township, Poweshiek County
- Jefferson Township, Ringgold County
- Jefferson Township, Shelby County
- Jefferson Township, Taylor County
- Jefferson Township, Warren County
- Jefferson Township, Wayne County
- Jenkins Township, Mitchell County
- Johns Township, Appanoose County
- Johnson Township, Plymouth County
- Johnson Township, Webster County
- Jones Township, Union County
- Jordan Township, Monona County
- Junction Township, Greene County
Read more about this topic: List Of Iowa Townships