| State: | OH |
| Type: | SR |
| Route: | 323 |
| Map: | OH 323 map.svg |
| Maint: | ODOT |
| Length Mi: | 18.64 |
| Length Round: | 2 |
| Length Ref: | [1] |
| Established: | 1932 |
| Direction A: | West |
| Terminus A: | in South Solon |
| Direction B: | East |
| Terminus B: | near Mount Sterling |
| Counties: | Madison |
| Previous Type: | US |
| Previous Route: | 322 |
| Next Type: | SR |
| Next Route: | 324 |
State Route 323 (SR 323) is an east - west state highway in southwestern Ohio. SR 323's western terminus is at SR 41 in South Solon. Its eastern terminus is at SR 56 just northwest of Mount Sterling.
SR 323 runs exclusively within the southern portion of Madison County. No portion of SR 323 is included within the National Highway System.[2]