| Official Name: | Waterfall, Alaska |
| Settlement Type: | Unincorporated community |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Alaska |
| Subdivision Type2: | Borough |
| Subdivision Name2: | Unorganized[1] [2] |
| Subdivision Type4: | Township |
| Subdivision Name4: | T S R E Copper River Meridian |
| Leader Title: | State senator |
| Leader Name: | Bert Stedman (R) |
| Leader Title1: | State rep. |
| Leader Name1: | Dan Ortiz (I) |
| Established Title: | Settled |
| Population As Of: | 2000 |
| Timezone: | Alaska (AKST) |
| Utc Offset: | -9 |
| Timezone Dst: | AKDT |
| Utc Offset Dst: | -8 |
| Coordinates: | 55.2972°N -133.2406°W |
| Postal Code Type: | ZIP code |
| Area Code: | 907 |
| Blank Name: | FIPS code |
| Blank Info: | 02- |
| Blank1 Name: | GNIS feature ID |
Waterfall is an Unincorporated community on the west coast of Prince of Wales Island in Prince of Wales-Hyder Census Area, Alaska, United States, approximately west of Ketchikan. The primary industry was Waterfall Cannery, built in 1912 as a salmon processing facility. The cannery closed in 1973 and was renovated into the Waterfall Resort, a sport fishing lodge.
Waterfall is not connected to the island's road system; visitors to the resort arrive by floatplane from Ketchikan.