Montgomery
City
- Clarksville (county seat)
Unincorporated communities
- Collinsville (restored community, presently billed as “Historic Collinsville”)
- Cunningham
- Dotsonville
- Excell
- Fredonia
- Needmore
- New Providence
- Oak Plains
- Oakwood
- Oakridge
- Orgains Crossroads
- Palmyra
- [[Port Royal, Tennessee|Port Royal
- [[Round Pond, Tennessee|Round Pond
- [[Salem, Tennessee|Salem
- Sango
- Southside
- St. Bethlehem
- Stringtown
- Tarsus
- Woodlawn
- Woodridge Estates
