The 12th Utah Senate District is located in Salt Lake and Tooele Counties, Utah, USA, and includes Utah House Districts 21, 22, 29, 32, 33, 38, and 42.
The current State Senator representing the 12th district is Karen Kwan.
| - ! Name | Party | Term | - | - | Democratic | 2023– present | - | - | Democratic | 2023–2023 | - | - | Republican | 2011–2022 | - | - | Democratic | 2005–2010 | - | - | Ron Allen | Democratic | 2003–2005 | - | - | Democrat | 1991–2002 | - | - | Republican | 1979–1990 | - | - | Carl E. Pettersson | Democrat | 1973–1978 | - | - | Merrill Jenkins | Democrat | 1967–1972 | - | - | Samuel J. Taylor | Republican | 1963–1965 | - | - | Republican | 1959–1961 | - | - | Donald T. Adams | Democrat | 1951–1957 | - | - | Republican | 1943–1949 | - | - | Byron A. Howard | Democrat | 1939–1941 | - | - | Wendall Peterson | Democrat | 1937 | - | - | W.D. Hammond | Democrat | 1935 | - | - | Knox Patterson | Democrat | 1927–1933 | - | - | Democrat | 1923–1925 | - | William T. Lamph | 1919–1921 | - | 1915–1917 | - | G.A. Iverson | 1911–1913 | - | Alonzo Brinkerhoff | 1907–1909 | - | - | Democrat | 1899–1905 | - | M.E. Johnson | 1897 | - | Reuben G. Miller | 1896 | - |
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See main article: Elections in the United States.