- Schnell
- Schoper
- Schram City
- Schrodts Station
- Schrum
- Schuline
- Schultz's Subdivision
- Schwer
- Sciota
- Scioto Mills
- Scott AFB
- Scottland
- Scotts
- Scotts Mill
- Scottsburg
- Scottsville
- Scottville
- Scovel
- Scraper-Moecherville
- Seaton
- Seatonville
- Seawards Island
- Sebastopol
- Secor
- Seehorn
- Sefton
- Sellers
- Selmaville
- Seminary
- Senate Island