| District of Iowa | |
| Des Moines, 1862-1882 | |
| Council Bluffs, 1880-1882 | |
| Dubuque, 1880-1882 | |
| Keokuk, 1880-1882 | |
| Northern District of Iowa | |
| Dubuque, 1882-1911 | |
| Fort Dodge, 1882-1911 | |
| Sioux City, 1882-1911 | |
| Cedar Rapids, 1892-1911 | |
| Southern District of Iowa | |
| Council Bluffs, 1882-1911 | |
| Des Moines, 1882-1911 | |
| Keokuk, 1882-1911 | |
| Creston, 1900-1911 | |
| Davenport, 1904-1911 | |
| Ottumwa, 1907-1911 | |