Identifiers: city · village · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Marion (city), OH | 35,999 |
| 2 | Tiffin (city), OH | 17,953 |
| 3 | Bucyrus (city), OH | 11,684 |
| 4 | Galion (city), OH | 10,453 |
| 5 | Upper Sandusky (city), OH | 6,698 |
| 6 | Carey (village), OH | 3,565 |
| 7 | Arlington (village), OH | 1,492 |
| 8 | Forest (village), OH | 1,350 |
| 9 | Sycamore (village), OH | 793 |
| 10 | Dunkirk (village), OH | 774 |
| 11 | Nevada (village), OH | 706 |
| 12 | Caledonia (village), OH | 560 |
| 13 | Mount Blanchard (village), OH | 471 |
| 14 | Morral (village), OH | 373 |
| 15 | McCutchenville (CDP), OH | 371 |
| 16 | Vanlue (village), OH | 341 |
| 17 | Wharton (village), OH | 328 |
| 18 | New Riegel (village), OH | 286 |
| 19 | North Robinson (village), OH | 219 |
| 20 | Chatfield (village), OH | 205 |
Identifiers: city · village · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Marion (city), OH | 35,999 |
| 2 | Tiffin (city), OH | 17,953 |
| 3 | Bucyrus (city), OH | 11,684 |
| 4 | Galion (city), OH | 10,453 |
| 5 | Upper Sandusky (city), OH | 6,698 |
| 6 | Carey (village), OH | 3,565 |
| 7 | Arlington (village), OH | 1,492 |
| 8 | Forest (village), OH | 1,350 |
| 9 | Sycamore (village), OH | 793 |
| 10 | Dunkirk (village), OH | 774 |
| 11 | Nevada (village), OH | 706 |
| 12 | Caledonia (village), OH | 560 |
| 13 | Mount Blanchard (village), OH | 471 |
| 14 | Morral (village), OH | 373 |
| 15 | McCutchenville (CDP), OH | 371 |
| 16 | Vanlue (village), OH | 341 |
| 17 | Wharton (village), OH | 328 |
| 18 | New Riegel (village), OH | 286 |
| 19 | North Robinson (village), OH | 219 |
| 20 | Chatfield (village), OH | 205 |