| Peter McMartin | |
| Birth Date: | May 11, 1805 |
| Birth Place: | New York |
| Death Date: | after 1870 |
| Residence: | Jersey City, New Jersey |
| Office: | Mayor of Jersey City |
| Order: | 2nd |
| Term Start: | April 1840 |
| Term End: | April 1841 |
| Predecessor: | Dudley S. Gregory |
| Successor: | Dudley S. Gregory |
| Spouse: | Harriet Lyon |
Peter McMartin (born May 11, 1805) was the second Mayor of Jersey City, New Jersey.
When Jersey City was incorporated as a municipality on February 22, 1838, McMartin was a member of the first Common Council. He succeeded Dudley S. Gregory as mayor two years later. He served a single one-year term from April 1840 to April 1841.[1] He was succeeded by Gregory. He served as Jersey City freeholder in 1847 and 1848.
On November 16, 1830, Martin married Harriet Lyon at St. Matthew's Episcopal Church in Jersey City.[2]