| State: | ME |
| Type: | ME |
| Route: | 9B |
| Map Custom: | yes |
| Length Mi: | 4.1 |
| Length Round: | 1 |
| Direction A: | West |
| Terminus A: | in Wells |
| Direction B: | East |
| Terminus B: | in Wells |
| Counties: | York |
| Established: | 1955 (current routing) |
| Previous Type: | ME |
| Previous Route: | 9A |
| Next Type: | ME |
| Next Route: | 10 |
| Spur Type: | ME |
| Spur Of: | 9 |
State Route 9B (SR 9B) is a short state highway in southern Maine. It begins in the west at an intersection with SR 9, serving as a 4.1miles southern spur of the highway, to U.S. Route 1 (US 1) near Wells Beach. The route is located entirely within Wells.
SR 9B begins west of town, where SR 9 begins to turn to the northeast. It runs eastward, intersecting local roads as it heads towards the coastline. SR 9B crosses over the Maine Turnpike without an interchange (the nearest entrance is at Exit 19, accessible from SR 9/SR 109). SR 9B continues eastward until it intersects and ends at US 1.
SR 9B used to be co-signed with US 1 from Charles Chase Corner (its current terminus) north to US 1's intersection with SR 9 in Wells, connecting SR 9B to its parent at both ends and making it a loop. However, in 1955 the concurrency was removed,[1] truncating SR 9B to its current terminus and reducing it to a spur.