Iowa's 21st Senate district

Iowa's 10th State Senate district
Senator	Mike Bousselot R

The 21st District of the Iowa Senate is located in central Iowa, United States, and is currently composed of part of Polk County. ^[1]

Current elected officials

Mike Bousselot is the senator currently representing the 21st District. ^[2]

The area of the 21st District contains two Iowa House of Representatives districts: ^[3]

• The 41st District (represented by Ryan Weldon)
• The 42nd District (represented by Heather Matson)

The district is also located in Iowa's 3rd congressional district, which is represented by Zach Nunn. ^[4]

Past senators

The district has previously been represented by: ^{[5] [6]}

• Patrick Deluhery, 1983–1992
• Maggie Tinsman, 1993–2002
• Dennis Black, 2003–2012
• Matt McCoy, 2013–2018
• Claire Celsi, 2019–present

Historical district boundaries

Map	Description	Years effective	Notes
	Jackson County	1852–1855	From 1846 to 1857, district numbering was not utilized by the Iowa State Legislature. This convention was added with the passing of the 1857 Iowa Constitution. Numbering of districts pre-1857 is done as a matter of historic convenience. [7]
	Scott County	1856–1859
	Clinton County	1860–1863
	Warren County	1864–1877
	Scott County	1878–1962
	Johnson County	1963–1966
	Audubon County Dallas County Guthrie County	1967–1970
	Benton County Black Hawk County (partial) Tama County	1971–1972
	Polk County (partial) Story County (partial)	1973–1982

Recent election results from statewide races

Year	Office	Results [8]
2008	President	McCain 51–47%
2012	President	Romney 54–46%
2016	President	Trump 48–43%
	Senate	Grassley 62–34%
2018	Governor	Hubbell 49.4–48.7%
	Attorney General	Miller 75–25%
	Secretary of State	Pate 51–47%
	Treasurer	Fitzgerald 58–39%
	Auditor	Sand 51–47%
2020	President	Biden 49.1–48.6%
	Senate	Ernst 49–48%
2022	Senate	Grassley 50.2–49.7%
	Governor	Reynolds 52–46%
	Attorney General	Miller 55–45%
	Secretary of State	Pate 56–44%
	Treasurer	Fitzgerald 56–44%
	Auditor	Sand 57–43%
2024	President	Trump 50–48%

See also

• Iowa General Assembly
• Iowa Senate

References

1. "SENATE DISTRICT 21" (PDF). Iowa General Assembly . Retrieved March 28, 2024.
2. Agency, Iowa Legislative Services. "Iowa Legislature - Legislator List" . Retrieved July 15, 2016.
3. "Iowa House Districts" (PDF). Iowa Legislative Services Agency. Retrieved July 15, 2016.
4. "Iowa Congressional Districts" (PDF). Iowa Legislative Services Agency. Retrieved July 15, 2016.
5. "Members of Iowa General Assemblies" (PDF). Iowa General Assembly. 2014. Retrieved July 15, 2016.
6. Frank J. Stork and Cynthia A. Clingan (1980). "The Iowa General Assembly: Our Legislative Heritage 1846-1980" (PDF). Iowa General Assembly. Retrieved July 15, 2016.
7. "1846 Iowa Constitution" (PDF).
8. "IA 2022 State Senate". Dave's Redistricting. Retrieved January 23, 2026.