John Prout (November 21, 1815 - August 28, 1890) was a Vermont attorney, politician, and judge who served as an Associate Justice of the Vermont Supreme Court from 1867 to 1869.
John Prout was born in Salisbury, Vermont on November 21, 1815, the son of John C. Prout (1795-1877) and Phebe (or Phoebe) Holman (1793-1836). He was educated in Salisbury, and then apprenticed as a printer. After working in the printing business for several years, Prout studied law with Ebenezer N. Briggs. He attained admission to the bar in 1837, and began to practice in partnership with Briggs. originally a member of the Whig Party, Prout served in the Vermont House of Representatives in 1847, 1848, and 1851. From 1848 to 1851 Prout served as State's Attorney of Addison County.
In 1854, Prout moved to Rutland, where he continued to practice law. He had different partners at different times, and among them were Walter C. Dunton and Aldace F. Walker. He represented Rutland in the Vermont House in 1865 and 1866, and Rutland County in the Vermont Senate in 1867. In 1867, Prout succeeded Loyal C. Kellogg as an Associate Justice of the Vermont Supreme Court, and he served until 1869, when he was replaced by Hoyt H. Wheeler.
After leaving the court, Prout continued to practice law until he retired in 1886.
Prout died in Rutland on August 28, 1890. He was buried at Evergreen Cemetery in Rutland.
In 1840, Prout married Louisa M. Cook (1823-1848). After his second wife's death, in 1849 Prout married Sarah P. Smith, who died in 1877. His third wife, who he married in 1878, was Ellen Sophia Ellsworth (1824-1897), the widow of George Washington Strong (1818-1858), and a descendant of Oliver Ellsworth.