| David Jennings | |
| State1: | Ohio |
| Term Start1: | March 4, 1825 |
| Term End1: | May 25, 1826 |
| Preceded1: | John Patterson |
| Succeeded1: | Thomas Shannon |
| Office2: | Member of the Ohio Senate |
| Term2: | 1819–1824 |
| Party: | Adams |
| Birth Date: | 1787 |
| Birth Place: | Readington Township, New Jersey |
| Death Place: | Baltimore, Maryland |
David Jennings (1787 - 1834) was a 19th-century American lawyer and politician who was a United States Representative from Ohio for part of one term from 1825 to 1826.
Born in Readington Township, New Jersey, Jennings attended the public schools. He moved to St. Clairsville, Ohio, in 1812.
He studied law, was admitted to the bar in 1813, and commenced practice in St. Clairsville. Jennings held several local offices, and served as prosecuting attorney of Belmont County from 1815 to 1825.
He served as member of the State senate from 1819 to 1824.
Jennings was elected as a pro-Adams Republican to the Nineteenth Congress and served from March 4, 1825, until his resignation on May 25, 1826.
He died in Baltimore, Maryland, in 1834.