Thomas A. Schweich was an American politician, diplomat, attorney, and author. A member of the Republican Party, Schweich served as State Auditor of Missouri from 2011 until his death in 2015.

The state auditor of Missouri is an elected constitutional officer in the executive branch of government of the U.S. state of Missouri. Thirty-eight individuals have occupied the office of state auditor since statehood. The incumbent is Scott Fitzpatrick, a Republican.