He served as clerk of Essex County from 1804–1811, and as Sheriff of Essex County from 1813-1816. He served as member of the New Jersey General Assembly in 1812, 1813, and 1816, and served in the New Jersey Legislative Council from 1819 to 1822.
He served as president of the Newark Banking Co. 1820-1842.
Condit was elected as an Anti-Jacksonian to the Twenty-second Congress, serving in office from March 4, 1831 to March 3, 1833. He engaged in banking. He served as delegate to the State constitutional convention in 1844. He died in Newark, New Jersey, November 29, 1861, and was interred in that city's First Presbyterian Church Cemetery.
- Silas Condit, Biographical Directory of the United States Congress. Accessed August 23, 2007.
- Silas Condit at the Biographical Directory of the United States Congress
- Silas Condit at The Political Graveyard
- Silas Condit at Find A Grave