Jacob Welsh Miller (August 29, 1800 - September 30, 1862) was a United States Senator from New Jersey. Born in German Valley, New Jersey, he attended the public schools, studied law, was admitted to the bar in 1823, and practiced in Morristown. He was elected to the New Jersey General Assembly in 1832 and served in the State council from 1838 to 1840. In 1840, he was elected as a Whig to the U.S. Senate, was reelected in 1846, and served from March 4, 1841, to March 3, 1853. While in the Senate, he was chairman of the Committee on the District of Columbia (Twenty-seventh and Twenty-eighth Congresses).
Miller died in Morristown, New Jersey in 1862 and was interred in St. Peter's Parish Churchyard.