| State: | NV |
| Type: | BLSR |
| Route: | 647 |
| Alternate Name: | W. Fourth Street / Prater Way / Victorian Avenue |
| Map Custom: | yes |
| Map Notes: | SR 647 highlighted in red |
| Length Mi: | 3.397 |
| Length Ref: | [1] |
| Established: | 1976 |
| Direction A: | West |
| Terminus A: | in Reno |
| Direction B: | East |
| Terminus B: | in Sparks |
| Counties: | Washoe |
| Previous Type: | SR |
| Previous Route: | 646 |
| Next Type: | SR |
| Next Route: | 648 |
State Route 647 (SR 647) is a state highway in Washoe County, Nevada. The route currently comprises a portion of West Fourth Street in Reno and a short segment of Prater Way in Sparks. The route previously extended a greater distance east–west through Reno–Sparks, and was formerly designated as part of U.S. Route 40.