The State Auditor of Missouri is an elected official responsible for serving as the State of Missouri's chief fiscal regulator, conducting financial and performance audits for approximately 200 state agencies, boards, and commissions, and the state's judicial branch. The State Auditor also conducts audits for county and city governments lacking their own auditor or when requested by citizen petition. The State Auditor serves a four-year term, and is the only state Executive Branch official elected in even-numbered non-presidential election years. The current State Auditor, Tom Schweich was elected in 2010, and is eligible for reelection in 2014.
| Name | Party | Term | County | |
| William Christy | Democratic-Republican | 1820–1821 | St. Louis | |
| William V. Rector | Democratic-Republican | 1821–1823 | St. Louis, MO | |
| Elias Barcroft | Democratic-Republican | 1823–1833 | St. Louis | |
| Henry Shurlds | Democrat | 1833–1835 | Washington | |
| Peter Garland Glover | Democrat | 1835–1837 | Callaway | |
| Hiram H. Baber | Democrat | 1837–1845 | Cole | |
| William Monroe | Democrat | 1845 | Morgan | |
| James W. McDearmon | Democrat | 1845–1848 | St. Charles | |
| George W. Miller | Democrat | 1848–1849 | Cole | |
| Wilson Brown | Democrat | 1849–1852 | Cape Girardeau | |
| Abraham Fulkerson | Democrat | 1852 | Cole | |
| William H. Buffington | Democrat | 1853–1861 | Cole | |
| W. S. Moseley | Democrat | 1861–1865 | New Madrid | |
| Alonzo Thompson | Republican | 1865–1869 | Nodaway | |
| Daniel Draper | Republican | 1869–1873 | Montgomery | |
| George Boardman Clark | Democrat | 1873–1875 | Washington | |
| Thomas Holloday | Democrat | 1875–1881 | Madison | |
| John Walker | Democrat | 1881–1889 | Howard | |
| James Monroe Seibert | Democrat | 1889–1901 | Cape Girardeau | |
| Albert Otis Allen | Democrat | 1901–1905 | New Madrid | |
| William Werner Wilder | Republican | 1905–1909 | Ste. Genevieve | |
| John Pemberton Gordon | Democrat | 1909–1917 | Lafayette | |
| George Ernst Hackman | Republican | 1917–1925 | Warren | |
| Lorenzo Dow Thompson | Republican | 1925–1933 | Callaway | |
| Forrest Smith | Democrat | 1933–1949 | Ray | |
| W. H. Holmes | Democrat | 1949–1953 | Maries | |
| Haskell Holman | Democrat | 1953–1971 | Randolph | |
| Christopher Bond | Republican | 1971–1973 | Audrain | |
| John Ashcroft | Republican | 1973–1974 | Greene | |
| George W. Lehr | Democrat | 1974–1977 | Jackson | |
| Thomas M. Keyes | Democrat | 1977–1978 | Jackson | |
| James Antonio | Republican | 1978–1984 | Cole | |
| Margaret B. Kelly | Republican | 1984–1999 | Cole | |
| Claire McCaskill | Democrat | 1999–2007 | Jackson | |
| Susan Montee | Democrat | 2007–2011 | Buchanan | |
| Tom Schweich | Republican | 2011- | St. Louis |