The 1912 Missouri Attorney General election was held on November 5, 1912, to elect the Attorney General of the state of Missouri. The election coincided with the 1912 United States presidential election and the Missouri gubernatorial election.
The incumbent Attorney General, Elliott W. Major, a member of the Democratic Party, did not seek re-election to the post. Instead, he ran for and was elected Governor of Missouri.
The Democratic nominee for the office was John T. Barker. He faced Republican nominee John M. Dawson and several third-party candidates, including S. L. Walls of the Progressive Party. The emergence of the Progressive Party, led nationally by Theodore Roosevelt, significantly impacted the traditional two-party vote distribution in Missouri during this cycle.
According to the official state records, the results of the election were as follows:
- John T. Barker (Democrat): 351,211 votes
- John M. Dawson (Republican): 296,317 votes
- S. L. Walls (Progressive): 104,180 votes
- C. F. Enlow (Socialist): 24,967 votes
- W. H. Wilcox (Prohibition): 4,775 votes
- C. A. Steinecke (Socialist Labor): 1,515 votes
John T. Barker won the election with a plurality of the votes. His victory was part of a broader Democratic sweep of statewide offices in Missouri that year. Barker assumed office in January 1913 and served a four-year term ending in 1917.
