See biography by L. H. Gipson (1920, repr. 1971).
See H. Binney, The Leaders of the Old Bar of Philadelphia (1859).
He studied law, was admitted to the bar in 1802 and commenced practice in Philadelphia. He was elected as a Democratic-Republican to the Thirteenth Congress, where he served as chairman of the United States House Committee on the Judiciary. He was not a candidate for renomination in 1814, having been appointed United States district attorney for Pennsylvania. He served in that office from 1815 to 1829, and was a member of the State improvement convention in 1825.
He was a member of the Pennsylvania House of Representatives in 1830, and a member of the State constitutional convention in 1837.
He was appointed secretary of the legation to Prussia on March 8, 1837. He was an unsuccessful candidate in 1837 for election to fill the vacancy caused by the death of Francis J. Harper in the Twenty-fifth Congress. He was again an unsuccessful candidate for election in 1838.
Ingersoll was elected as a Democrat to the Twenty-seventh and to the three succeeding Congresses. He served as chairman of the United States House Committee on Foreign Affairs during the Twenty-eighth and Twenty-ninth Congresses). He was not a candidate for renomination in 1848. He was appointed Minister to France in 1847 but was not confirmed by the Senate. He died in 1862 in Philadelphia. Interment in The Woodlands Cemetery.