| State: | ME |
| Type: | SR |
| Route: | 231 |
| Map Custom: | yes |
| Length Mi: | 11.51 |
| Length Ref: | [1] |
| Established: | 1954 |
| Direction A: | South |
| Direction B: | North |
| Terminus A: | in North Yarmouth |
| Terminus B: | in New Gloucester |
| Counties: | Cumberland |
| Previous Type: | SR |
| Previous Route: | 230 |
| Next Type: | SR |
| Next Route: | 232 |
State Route 231 (SR 231) is a 11.51-longNaN-long state highway located in Cumberland County in southeastern Maine. It begins at State Route 115 in North Yarmouth and runs north to New Gloucester, where it ends at U.S. Route 202, State Route 4 and State Route 100. The highway functions as an eastern bypass of Gray.
SR 231 begins at SR 115 in North Yarmouth, where SR 115 turns northwest on Gray Road towards downtown Gray. SR 231 proceeds north thRough the town center and crosses the Royal River. The highway nicks the eastern corner of Gray and crosses into the town of New Gloucester, where it continues north through the town center and terminates at Lewiston Road, which carries US 202 / SR 4 / SR 100.
SR 231 is called New Gloucester Road in North Yarmouth and Intervale Road in New Gloucester.