Mark Thomson ( * 1739 in Norristown, Pennsylvania, † December 14, 1803 in Marksboro, New Jersey ) was an American politician. Between 1795 and 1799 he represented the State of New Jersey in the U.S. House of Representatives.
Mark Thomson grew up during the British colonial period and worked as a miller. In 1773 he was Justice of the Peace in Sussex County, New Jersey. Thomson joined early on the American Revolution, and was in the years 1774 to 1775 a member of the Provincial Congress. At the beginning of the Revolutionary War he served as a colonel in the state militia. At the same time he embarked on a political career. In 1779 he was a deputy in the New Jersey General Assembly; 1786 to 1788 he sat in the State Council, the forerunner of today's state Senate. Since 1793, he served on the senior staff of Governor Richard Howell.
The New Jersey State far discharged congressional elections of 1794 Thomson was elected for the third seat of his state in the U.S. House of Representatives, where he became the successor of Jonathan Dayton on March 4, 1795. After a re-election he was able to complete in Congress until March 3, 1799 two legislative sessions. During this time he became a member of the Federalist Party, founded by Alexander Hamilton. After the end of his time in the U.S. House of Representatives Thomson withdrew from politics. He died on 14 December 1803 in Marksboro.