| Jonathan P. Folsom | |
| Office: | 20th Mayor of Lowell, Massachusetts |
| Term Start: | January 4, 1869 |
| Term End: | 1870 |
| Predecessor: | George F. Richardson |
| Successor: | Edward F. Sherman |
| Office3: | Member of the Lowell, Massachusetts Board of Aldermen |
| Term Start3: | 1859; 1861; 1878; |
| Term End3: | 1859; 1862; 1878 |
| Office4: | Member of the Lowell, Massachusetts Common Council |
| Term Start4: | 1856; 1867; 1867; |
| Term End4: | 1856; 1867; 1867; |
| Office2: | Member of the Massachusetts House of Representatives |
| Birth Date: | October 9, 1820 |
| Birth Place: | Tamworth, New Hampshire |
| Death Date: | February 23, 1893 (aged 72) |
Jonathan P. Folsom (October 9, 1820 - February 23, 1893) served as the twentieth Mayor of Lowell, Massachusetts.
Folsom was, for many years, involved in the dry goods trade. Folsom had a dry goods store on Merrimack Street, in Lowell.
Folsom was a director of the Old Lowell National Bank, and a Trustee of the Central Savings Bank.
Folsom was a member of the Lowell Common Council, Board of Aldermen, and was twice elected the mayor of Lowell. After he was mayor Folsom served two terms in the Massachusetts legislature as a member of the Massachusetts House of Representatives.