| Louis Marcus | |
| Office: | 23rd Mayor of Salt Lake City |
| Term Start: | 1931 |
| Term End: | 1936 |
| Predecessor: | John F. Bowman |
| Successor: | E. B. Erwin |
| Death Date: | July 6, 1936 (aged 56) |
| Death Place: | Salt Lake City, Utah, U.S. |
| Birth Place: | Brooklyn, New York, U.S. |
| Birth Date: | January 6, 1880 |
| Resting Place: | Salt Lake City Cemetery |
Louis Marcus (January 6, 1880 – July 6, 1936) was an American politician who served as the 23rd mayor of Salt Lake City from 1931 to 1936. Outside of politics, Marcus was also a prominent Idaho and Utah theater operator., Marcus is the only Jewish mayor in the city's -year history. He served as mayor until his death on July 6, 1936. He is buried in the Salt Lake City Cemetery.[1]