| Simon J. Murphy Jr. | |
| Office: | 28th Mayor of Green Bay, Wisconsin |
| Term Start: | 1899 |
| Term End: | 1902 |
| Predecessor: | Frank B. Desnoyers |
| Successor: | J. H. Tayler |
| Birth Name: | Simon Jones Murphy Jr. |
| Birth Date: | 27 March 1851 |
| Birth Place: | Maine, U.S. |
| Spouse: | Helena Bogardus Platt |
| Children: | 5 |
| Parents: | Simon J. Murphy Sr. Ann Montgomery Dorr |
| Alma Mater: | Lawrence Scientific School |
| Occupation: | Politician, businessman |
Simon Jones Murphy Jr. (March 27, 1851 – September 1, 1926) was an American politician and businessman who served as the 28th mayor of Green Bay, Wisconsin, from 1899 to 1902.
Murphy was born Simon Jones Murphy Jr. on March 27, 1851, in Maine.[1] His father was Simon J. Murphy Sr., a prominent lumberman. He attended primary school in Bangor, Maine and moved with his family to Detroit, Michigan, in 1866 before graduating from the Lawrence Scientific School. Murphy married Helena Bogardus Platt and the couple had five children. Murphy moved to Green Bay in 1886. He died on September 1, 1926.
Murphy was Mayor from 1899 to 1901. He made a living by running a sawmill.