| Surname | Township |
| Yancey | Cache |
| Yancy | Cache, Hurricane, Shady Grove |
| Yantis | Ward 2 |
| Yarber | Ward 3 |
| Yarborough | Clarke |
| Yarbrough | Ward 2 |
| Yates | Hurricane, Union, Ward 1, Ward 2, Ward 3 |
| Yeargain | Friendship, Union |
| Yoder | Lake |
| Yopp | St. Francis |
| York | Cache, Lake, Spring Grove, St. Francis |
| Young | Jones, Poland, Salem, Ward 1, Ward 2, Ward 3 |
| Yow | Clarke, Mainshore, Shady Grove, St. Francis |
| Yutten ? | Ward 2 |
| Surname | Township |
| Zeigler | Ward 3 |
| Zeins | Lake |
| Zook | Jones |
| Zuna | Ward 2 |
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