The 1880 Missouri State Auditor election was held on 2 November 1880 in order to elect the state auditor of Missouri. Democratic nominee John Walker defeated Republican nominee L. A. Thompson and Greenback nominee A. C. Marquis.
On election day, 2 November 1880, Democratic nominee John Walker won the election by a margin of 55,921 votes against his foremost opponent Republican nominee L. A. Thompson, thereby retaining Democratic control over the office of state auditor. Walker was sworn in as the 18th state auditor of Missouri on 10 January 1881.[1]