| State: | HI |
| Type: | HI |
| Route: | 240 |
| Alternate Name: | Honokaa-Waipio Road |
| Length Mi: | 9.6 |
| Map Custom: | yes |
| Direction A: | West |
| Terminus A: | Waipio Valley Road |
| Direction B: | East |
| Terminus B: | southeast of Honokaa |
| Counties: | Hawaii |
| Previous Type: | HI |
| Previous Route: | 220 |
| Next Type: | HI |
| Next Route: | 250 |
Hawaii Route 240 is a state highway in Hawaii County, Hawaii, United States.
The highway is located on the island of Hawaii, and travels from southeast of the city of Honokaa northwest to Waimanu Natural Estuarine Research Reserve, on the coast of the island.[1] The highway connects the settlement located by the Reserve to the main highway, Hawaii Route 19.[2]