| Ralph Metcalf | |
| Office: | President pro tempore of the Washington Senate |
| Term Start: | January 10, 1927 |
| Term End: | January 14, 1929 |
| Predecessor: | Edward J. Cleary |
| Successor: | Fred W. Hastings |
| State Senate1: | Washington |
| District1: | 26th |
| Term Start1: | January 14, 1907 |
| Term End1: | April 14, 1939 |
| Preceded1: | Waldemer E. Bronson |
| Succeeded1: | Leo McGavick |
| Birth Date: | 2 November 1861 |
| Birth Place: | Providence, Rhode Island, U.S. |
| Death Place: | Tacoma, Washington, U.S. |
| Party: | Republican |
Ralph Metcalf (November 2, 1861 - April 14, 1939) was an American politician in the state of Washington. He served in the Washington State Senate from 1907 to 1939.[1] From 1927 to 1929, he was president pro tempore of the Senate.[2]