On November 6, 2018, a general election in the U.S. state of Missouri was held for the post of State Auditor of Missouri. The election for Missouri State Auditor coincided with the U.S. federal midterm elections that were held throughout all 50 states, as well with other state legislative and local races in Missouri. Missouri's Class 1 United States Senate seat was also up for election on November 6, 2018. Galloway won election to a full term. Prior to this, Galloway had been appointed to the post by former Governor Jay Nixon in 2015, following the death of Tom Schweich.