| State: | ME |
| Type: | ME |
| Route: | 86 |
| Map Custom: | yes |
| Length Mi: | 10.28 |
| Length Round: | 2 |
| Length Ref: | [1] |
| Established: | 1962 |
| Direction A: | West |
| Terminus A: | near East Machias |
| Direction B: | East |
| Terminus B: | in Dennysville |
| Counties: | Washington |
| Previous Type: | ME |
| Previous Route: | 85 |
| Next Type: | ME |
| Next Route: | 88 |
State Route 86 (SR 86) is part of Maine's system of numbered state highways, located in the far eastern part of the state. It is a minor connecting route, running 10.3miles from an intersection with SR 191 near East Machias to an intersection with U.S. Route 1 (US 1) in Dennysville. SR 86 runs mostly through unincorporated forest land.
SR 86 begins at an intersection with SR 191 in Marion Township, part of the unorganized territory of East Central Washington, just outside East Machias. SR 86 proceeds eastward through unincorporated Edmunds Township into the town of Dennysville, where it ends at US 1. SR 86 is named King Road in Dennysville.