William Sims | |
|---|---|
 Vice Admiral William Sowden Sims | |
| Birth name | William Sowden Sims |
| Born | October 15, 1858 Port Hope, Canada West |
| Died | September 28, 1936 (aged 77) Boston, Massachusetts, US |
| Allegiance | United States |
| Service | United States Navy |
| Years of service | 1880–1922 |
| Rank | Admiral |
| Commands | Naval War College U.S. Naval Forces Operating in European Waters (WWI) |
| Battles / wars | World War I |
| Awards | Navy Distinguished Service Medal |
| Other work | Pulitzer Prize for History |
William Sowden Sims (October 15, 1858 – September 28, 1936) was an admiral in the United States Navy who fought during the late 19th and early 20th centuries to modernize the navy. During World War I, he commanded all United States naval forces operating in Europe. He also served twice as president of the Naval War College.