Preceded by Stephen C. Roszel Parents James Mercer Succeeded by Joseph Lewis, Jr. Education Princeton University | Preceded by Joseph Lewis, Jr. Name Charles Mercer Role Politician Uncles George Mercer | |
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Books A Discourse on Popular Education: Delivered in the Church at Princeton, the Evening Before the Annual Commencement of the College of New Jersey, September 26, 1826 |
Charles Fenton Mercer (June 16, 1778 – May 4, 1858) was a nineteenth-century politician, U.S. Congressman, and lawyer from Loudoun County, Virginia.

Biography
The youngest son of James Mercer and Eleanor Mercer, Charles Mercer was the first cousin of Robert Selden Garnett and James Mercer Garnett, both also members of Congress.
Born in Fredericksburg, Virginia, Mercer graduated from Princeton College in 1797, where he later took a postgraduate course and received his degree in 1800. He studied law and was admitted to the bar in 1802, commencing practice in Aldie, Virginia, a village that he founded in 1810, centering on Mercer's mill. He was a member of the Virginia House of Delegates from 1810 to 1817 and was appointed a lieutenant colonel of a Virginia regiment in the War of 1812. Mercer was later promoted to major in command at Norfolk, Virginia, was inspector general in 1814, aide-de-camp to Governor James Barbour and brigadier general in command of the 2nd Virginia Brigade.
He was projector and first president of the Chesapeake & Ohio Canal Co. from 1828 to 1833 and was a delegate to the Virginia Constitutional Convention in 1829. Mercer was elected a Federalist, Crawford Republican, Adams Republican, Anti-Jacksonian and Whig to the United States House of Representatives in 1816, serving from 1817 to 1839. There, he served as Chairman of the Committee on Roads and Canals from 1831 to 1839.
Mercer was elected as a delegate to the Virginia Constitutional Convention of 1829-1830. In 1829, he was elected by the Convention to serve on the Committee of the Legislative Department. He was one of four delegates elected from the senatorial district made up his home district of Loudoun, and Fairfax County, alongside James Monroe.
He was one of the originators of the plan for establishing the Free State of Liberia, and in that context one of the founders of the American Colonization Society in 1816, was vice president of the Virginia Colonization Society in 1836, and vice president of the National Society of Agriculture in 1842.
Mercer died at Howard, near Alexandria, Virginia, on May 4, 1858 and was interred in Union Cemetery in Leesburg, Virginia.