Jacob Welsh Miller (August 29, 1800 – September 30, 1862) was a United States senator from New Jersey.

In 1800, Miller was born in German Valley, New Jersey (in Washington Township, Morris County), United States, North America.^[1] He attended the public schools, studied law, was admitted to the bar in 1823, and practiced in Morristown.^[1]

In 1832, Miller was elected to the New Jersey General Assembly. From 1839 to 1840, he then represented Morris County in the New Jersey Legislative Council (now the New Jersey Senate).^[1]

In 1839, Miller was elected as a Whig to the state Senate, and to the U.S. Senate in 1841.^[1] He was reelected in 1847, 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).^{[citation needed]}

He joined the Republican Party in 1855.^[1]

In 1825, Miller married Mary Louisa Macculloch, the daughter of George P. Macculloch, a wealthy Morristown engineer and businessman who had designed and built the Morris Canal. They had nine children, including attorney George Macculloch Miller,^[2] and Captain Lindley Miller, who served as an officer of a black infantry regiment during the Civil War and wrote "Marching Song of the First Arkansas".^{[citation needed]}

In 1862, Miller died in Morristown, New Jersey.^[1][3] He was interred in St. Peter's Parish Churchyard.