John J. Hardin (January 6, 1810 – February 23, 1847) was a U.S. Representative and militia general from Illinois.
Born in Frankfort, Kentucky, Hardin pursued classical studies and was graduated from Transylvania University, Lexington, Kentucky, where he studied law. He was admitted to the bar in Kentucky in 1831 and commenced practice in Jacksonville, Illinois. He served in the Illinois Militia during the Black Hawk War 1831–1832. He was brigadier general in command during the Illinois Mormon War in Hancock County, Illinois in 1844. He later attained the rank of Major General. He was appointed prosecuting attorney of Morgan County in 1832. He served as member of the Illinois House of Representatives 1836–1842. His son Martin Davis Hardin was born in 1837.
He was co-editor/founder of the Illinoisan newspaper in Jacksonville in 1837.(1) He was credited with helping to avert a duel between Abraham Lincoln and State Auditor James Shields. (2)
Hardin was elected as a Whig to the Twenty-eighth Congress (March 4, 1843 – March 3, 1845). He was not a candidate for renomination in 1844. During the Mexican–American War he recruited the First Regiment, Illinois Volunteer Infantry, of which he was commissioned colonel. He was killed at the Battle of Buena Vista, Mexico, February 23, 1847. He was interred in City Cemetery (East), Jacksonville, Illinois.
(1) Newspapers and Periodicals of Illinois 1814-1879 by Franklin William Scott, published by the Illinois State Historical Library, Springfield, IL. 1910. Page 203. (2)Abraham Lincoln: A Press Portrait by Herbert Mitgang, ©Copyright 2010 Fordham University Press. Pages 40–41.