Daniel D. Tompkins (June 21, 1774 – June 11, 1825) was an American politician. He was the fourth Governor of New York (1807–1817), and the sixth Vice President of the United States (1817–1825).A jurist by background, he was notable as one of the most enterprising governors in the War of 1812. To help organize the state militia, he often invested his own capital when the legislature would not approve the necessary funds.