- Schwer
- Scioto Mills
- Scott AFB
- Scottland
- Scotts
- Scotts Mill
- Scottsburg
- Scottsville
- Scovel
- Scraper-Moecherville
- Seawards Island
- Sebastopol
- Seehorn
- Sefton
- Sellers
- Selmaville
- Seminary
- Senate Island
- Sepo
- Serena
- Seville
- Seward
- Sexson Corner
- Seymour
- Shabbona Grove
- Shadow Lawn
- Shady Acres
- Shady Beach
- Shady Grove
- Shady Hollow