Enoch White Clark (1802 – August 4, 1856) was the founder of E. W. Clark & Co., a prominent financial firm based in Philadelphia, Pennsylvania, that helped the U.S. government finance the Mexican–American War. In 1857, Clark was listed as one of Philadelphia's 25 millionaires.
Clark was born in 1802 in Easthampton, Massachusetts, a descendant of Captain William Clark (1609–1690), who emigrated from England aboard the ship Mary and John and landed at Plymouth, Massachusetts, in 1630, and moved to the town of Easthampton in 1639. Enoch traced his descent from William as follows: John (1651-1704), John (1679-1768), Eliakim (1707-1781), Lt. Asahel (1737-1822), to his father, Bohan (1772-1846), a merchant and miller who married Mary White (1777-?) on February 11, 1802.
On February 1, 1826, he married Sarah Crawford Dodge (1806-1878), daughter of Nehemiah Dodge. (After she died, her son Edward White Clark commissioned a stained-glass window in her memory in the First Unitarian Church of Philadelphia.)
Clark was at the time a broker for Allen & Co.
In 1837, Enoch founded E. W. Clark & Co.
Clark died on August 4, 1856, of nicotine poisoning.
Clark was the patriarch of a family that gained much prominence in Philadelphia and national affairs. He married Sarah Crawford Dodge. Together they had at least four sons and three daughters: