| Capital: | Celina |
|---|---|
| Origen y Formación del condado: | Darke County |
| Población: | 40,814 habitantes |
| Área: | 463 sq mi |
| Localización del condado dentro de Ohio: |
|
Localidades en Mercer, Ohio
- Black Creek Township Mercer County
- Burkettsville
- Butler Township Mercer County
- Celina
- Center Township Mercer County
- Chickasaw
- Coldwater
- Dublin Township Mercer County
- Fort Recovery
- Franklin Township Mercer County
- Gibson Township Mercer County
- Granville Township Mercer County
- Hopewell Township Mercer County
- Jefferson Township Mercer County
- Liberty Township Mercer County
- Maria Stein
- Marion Township Mercer County
- Mendon
- Montezuma
- Recovery Township Mercer County
- Rockford
- Saint Henry
- St. Henry
- Union Township Mercer County
- Washington Township Mercer County
- Wayne Township Mercer County