The 1912 Missouri lieutenant gubernatorial election was held on 5 November 1912 in order to elect the lieutenant governor of Missouri. Democratic nominee William Rock Painter defeated Republican nominee Hiram Lloyd, Progressive nominee James M. Burrus, Socialist nominee Richard Hatham, Prohibition nominee Julius C. Hughes and Socialist Labor nominee Sidney Johnson.
General election.
On election day, 5 November 1912, Democratic nominee William Rock Painter won the election by a margin of 118,203 votes against his foremost opponent Republican nominee Hiram Lloyd, thereby gaining Democratic control over the office of lieutenant governor. Painter was sworn in as the 28th lieutenant governor of Missouri on 13 January 1913.
Results.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
References.
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