| State: | RI |
| Type: | RI |
| Route: | 81 |
| Map Custom: | yes |
| Map Notes: | Route 81 highlighted in red |
| Length Mi: | 8.0 |
| Length Round: | 1 |
| Direction A: | South |
| Direction B: | North |
| Terminus A: | in Little Compton |
| Junction: | in Tiverton |
| Terminus B: | in Fall River, MA |
| Counties: | Newport |
| Previous Type: | Route |
| Previous Route: | 78 |
| Next Type: | I |
| Next Route: | 84 |
Route 81 is a numbered state highway running 8miles in Rhode Island. Route 81's southern terminus is at Rhode Island Route 179 in Little Compton and the northern terminus is a continuation as Massachusetts Route 81 near Fall River, Massachusetts.