| State: | RI |
| Type: | RI |
| Route: | 100 |
| Map Custom: | yes |
| Length Mi: | 9.3 |
| Length Round: | 1 |
| Direction A: | South |
| Direction B: | North |
| Terminus A: | in Glocester |
| Terminus B: | Wallum Lake Road in Douglas, MA |
| Counties: | Providence |
| Previous Type: | Route |
| Previous Route: | 99 |
| Next Type: | Route |
| Next Route: | 101 |
Route 100 is a numbered state highway running 9.3miles in Rhode Island. Route 100's southern terminus is at Route 102 in Glocester and the northern terminus is a continuation as Wallum Lake Road near Douglas, Massachusetts.
Route 100 takes the following route through the State:
7.2miles; Glocester town line to Massachusetts State line at Wallum Lake Road
Route 100 becomes an unnumbered road (Wallum Lake Road) in Massachusetts.