Missouri's 18th Senate district

Missouri's 18th State Senate district
Senator	Cindy O'Laughlin R – Shelbina
Demographics	90%  White 3%  Black 2%  Hispanic 1%  Asian 3%  Multiracial
Population (2023)	176,971 [1]

Missouri's 18th Senatorial District is one of 34 districts in the Missouri Senate. The district has been represented by Republican Cindy O'Laughlin since 2019 and she has served as President Pro Tempore since 2025. ^{[2] [3] [4]}

Geography

The district is based in rural northeastern Missouri and includes Adair, Audrain, Clark, Knox, Lewis, Macon, Marion, Monroe, Putnam, Ralls, Randolph, Schuyler, Scotland, and Shelby county. ^[2] Major municipalities in the district include Hannibal, Kirksville, Mexico, and Moberly. The district is also home to Truman State University, Mark Twain Lake, and several state parks, forests, and conservation areas..

Election Results (1998-2022)

1998

Missouri's 18th Senatorial District Election (1998) ^[5]

Party		Candidate	Votes	%
	Democratic	Joe Maxwell	34,503	72.8
	Republican	James Lemon	12,908	27.2
Total votes			47,411	100.0

2002

Missouri's 18th Senatorial District Election (2002) ^[6]

Party		Candidate	Votes	%
	Republican	John W. Cauthorn	29,853	55.5
	Democratic	Sam Berkowitz	23,890	44.5
Total votes			53,743	100.0
	Republican gain from Democratic

2006

Missouri's 18th Senatorial District Election (2006) ^[7]

Party		Candidate	Votes	%
	Democratic	Wes Shoemyer	28,795	51.7
	Republican	Robert J. Behnen	26,953	48.3
Total votes			55,748	100.0
	Democratic gain from Republican

2010

Missouri's 18th Senatorial District Election (2010) ^[8]

Party		Candidate	Votes	%
	Republican	Brian Munzlinger	30,532	58.3
	Democratic	Wes Shoemyer (incumbent)	21,813	41.7
Total votes			52,345	100.0
	Republican gain from Democratic

2014

Missouri's 18th Senatorial District Election (2014) ^[9]

Party		Candidate	Votes	%
	Republican	Brian Munzlinger (incumbent)	39,460	100.0
Total votes			39,460	100.0
	Republican hold

2018

Missouri's 18th Senatorial District Election (2018) ^[10]

Party		Candidate	Votes	%
	Republican	Cindy O'Laughlin	46,263	70.3
	Democratic	Crystal Stephens	19,555	29.7
Total votes			65,818	100.0
	Republican hold

2022

Missouri's 18th Senatorial District Election (2022) ^{[11] [2]}

Party		Candidate	Votes	%
	Republican	Cindy O'Laughlin (incumbent)	42,989	75.8
	Democratic	Ayanna Shivers	13,739	24.2
Total votes			56,728	100.0
	Republican hold

Statewide Election Results

Year	Office	Results
2008	President	McCain 57.6 – 39.5%
2012	President	Romney 64.9 – 35.1%
2016	President	Trump 72.4 – 23.4%
	Senate	Blunt 61.6 – 33.8%
	Governor	Greitens 63.1 – 34.3%
2018	Senate	Hawley 67.0 – 29.1%
2020	President	Trump 74.6 – 23.8%
	Governor	Parson 75.2 – 23.0%

Source: ^[12]

References

1. U.S. Census Bureau (2023). American Community Survey 5-year estimates. Retrieved from Census Reporter Profile page for Missouri State Senate District 18, MO
2. "Senator Cindy O'Laughlin". Missouri Senate.
3. "Senate Leadership - Missouri Senate". www.senate.mo.gov. Retrieved February 8, 2025.
4. "Cindy O'Laughlin makes history as first woman to lead Missouri Senate". FOX 2. November 19, 2024. Archived from the original on November 21, 2024. Retrieved February 8, 2025.
5. 1998 General Election Results
6. 2002 General Election Results
7. 2006 General Election Results
8. 2010 General Election Results
9. 2014 General Election Results
10. 2018 General Election Results
11. 2022 General Election Results
12. "DRA 2020". Daves Redistricting. Retrieved February 27, 2025.