| Stephen B. Leonard | |
| State: | New York |
| Term Start: | March 4, 1839 |
| Term End: | March 3, 1841 |
| Predecessor: | Cyrus Beers |
| Successor: | Samuel Partridge |
| Term Start2: | March 4, 1835 |
| Term End2: | March 3, 1837 |
| Predecessor2: | Nicoll Halsey |
| Successor2: | Andrew DeWitt Bruyn |
| Birth Name: | Stephen Banks Leonard |
| Birth Date: | 15 April 1793 |
| Birth Place: | New York City, U.S. |
| Death Place: | Owego, New York, U.S. |
| Resting Place: | Presbyterian Church Burying Ground |
| Party: | Democratic |
| Otherparty: | Jacksonian |
| Profession: | Politician, newspaperman |
Stephen Banks Leonard (April 15, 1793 – May 8, 1876) was an American newspaperman and politician who served two non-consecutive terms as a U.S. Representative from New York from 1835 to 1837, and from 1839 to 1841.
Born in New York City, Leonard attended the public schools.He moved with his parents to Owego, New York, and learned the printer's trade.He engaged in newspaper work in Albany, New York.He moved to New York City and subsequently returned to Owego.He was publisher and editor of the Owego Gazette 1814–1835.Trustee of the village of Owego.Supervisor and commissioner of excise.Trustee of Owego Academy for many years.He established the first stage route from Owego to Bath in 1816.Postmaster of Owego 1816–1820.
Leonard was elected as a Jacksonian to the Twenty-fourth Congress (March 4, 1835 – March 3, 1837).
Leonard was elected as a Democrat to the Twenty-sixth Congress (March 4, 1839 – March 3, 1841).He served as chairman of the Committee on Public Buildings and Grounds (Twenty-sixth Congress).He declined to be a candidate for reelection in 1840 to the Twenty-seventh Congress.
He engaged in mercantile and agricultural pursuits.Supervisor of Owego 1854–1856.Deputy United States marshal 1857–1861.
He died in Owego, New York, May 8, 1876.He was interred in the Presbyterian Church Burying Ground.