| Surname | Township |
| Igert | St. Francis |
| Inglehart | Jones |
| Ingram | Clarke |
| Ingrum | Mainshore |
| Inmon | Cache |
| Irby | Lake |
| Irving | Clarke, Ward 1 |
| Isbell | Jones |
| Ishmael | Salem |
| Isler | Ward 1 |
| Ivans | Shady Grove |
| Jackman | Union |
| Jackson | Bryan, Cache, Clarke, Friendship, Hurricane, Jones, Lake |
| Jackson | Salem, Spring Grove, Union, Ward 1, Ward 2, Ward 3 |
| Jacobs | Ward 2 |
| James | Jones, Ward 3 |
| Jamison | Union |
| Jariet | Poland |
| Jarvis | Friendship, Lake |
| Jeans | Friendship |
| Jeffers | Friendship, Ward 2 |
| Jeffett | Ward 2 |
| Jenkins | Hurricane, Mainshore, Ward 2 |
| Jennings | Ward 1 |
| Jering | Spring Grove |
| Jernigan | Poland |
| Jeter | Clarke, Friendhsip, Ward 2, Ward 3 |
| Jetton | Cache |
| Jinkins | Shady Grove |
| John | Lake |
| Johnson | Bryan, Cache, Clarke, Friendship, Hurricane, Jones |
| Johnson | Lake, Mainshore, Union, Ward 1, Ward 2, Ward 3 |
| Johnston | Friendship, Union |
| Joiner | Union, Ward 3 |
| Jones | Bryan, Cache, Clarke, Crowley, Hurricane |
| Jones | Jones, Lake, Mainshore, Poland, Salem, Shady Grove |
| Jones | Spring Grove, St. Francis, Union, Ward 1, Ward 2, Ward 3 |
| Jordan | Hurricane, Union, Ward 3 |
| Joseph | Ward 1 |
| Jowers | Ward 2 |
| Joyner | Clarke |
| Justice | Clarke, Ward 2 |
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