The 18th Utah Senate District is located in Davis and Weber Counties and includes Utah House Districts 8, 9, 10, 11, 13, and 16. The current State Senator representing the 18th district is Jon Greiner. Greiner was elected to the Utah Senate in 2006 and is up for re-election in 2010.
| - ! Name | Party | Term | - | - | David L. Thomas | Republican | 2003–2006 | - | - | D. Edgar Allen | Democrat | 1999–2002 | - | - | Nathan C. Tanner | Republican | 1995–1999 | - | - | Winn L. Richards | Democrat | 1987–1994 | - | - | Dale E. Stratford | Republican | 1983–1986 | - | - | Ronald T. Halverson | Republican | 1979–1982 | - | - | M. Blaine Peterson | Democrat | 1975–1978 | - | - | E. LaMar Buckner | Republican | 1973–1974 | - | - | Ezra T. Clark | Republican | 1967–1972 | - | - | Loren D. Squire | Democrat | 1965 | - | - | Republican | 1957–1963 | - |
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See main article: Elections in the United States.