450
- 45001 Addyston
- 45002 Cleves
- 45003 College Corner
- 45005 Franklin
- 45011 Hamilton
- 45013 Hamilton
- 45014 Fairfield
- 45015 Hamilton
- 45030 Harrison
- 45032 Harveysburg
- 45033 Hooven
- 45034 Kings Mills
- 45036 Lebanon
- 45039 Maineville
- 45040 Mason
- 45041 Miamitown
- 45042 Middletown
- 45044 Middletown
- 45050 Monroe
- 45051
- 45052 North Bend
- 45053 Okeana
- 45054 Oregonia
- 45056 Oxford
- 45062 Seven Mile
- 45064 Somerville
- 45065 South Lebanon
- 45066 Springboro
- 45067 Trenton
- 45068 Waynesville
- 45069 West Chester
- 45070 West Elkton