| Intro | American politician |
| Was | Politician |
| From | United States of America |
| Type | Politics |
| Gender | male |
| Birth | 12 June 1860, San Francisco |
| Death |
4 January 1935, San Francisco (aged 74 years) |
William Joseph Wynn (June 12, 1860 – January 4, 1935) was a machinist and U.S. Representative from California.
Born in San Francisco, California, Wynn attended the public schools of San Francisco. He was an apprentice in the machinist’s trade and subsequently worked in the principal manufacturing establishments of San Francisco. He then served as member of the board of supervisors of the city and county of San Francisco from January 8, 1902, to March 4, 1903.
Wynn was elected as a Democrat to the Fifty-eighth Congress (March 4, 1903 – March 3, 1905). He was an unsuccessful candidate for re-election in 1904 to the Fifty-ninth Congress. He then worked in the insurance business in San Francisco until his death on January 4, 1935. He is interred at Holy Cross Cemetery in Colma, California.