Iowa

Party registration totals from 2008 through 2026. Source: Iowa state election board filings.

Last Reported Date: 5/4/26

Republican (2026)

692,089

38.6% of total

Democratic (2026)

496,219

27.7% of total

Independent (2026)

588,500

32.9% of total

Other Parties (2026)

14,553

0.8% of total

Iowa — Party Registration Share

% of active registrants by party

Iowa — Raw Registration Totals

Active registrants by party

Iowa — Annual Registration Totals

Active registrants by party

Year	Republican	GOP %	Democratic	Dem %	Independent	Ind %	Other	Other %	Total	Filing Date
2026	692,089	38.6%	496,219	27.7%	588,500	32.9%	14,553	0.8%	1,791,361	5.4.26
2025	701,173	38.9%	503,619	27.9%	584,345	32.4%	14,805	0.8%	1,803,942	1.5.26
2024	720,798	38.8%	529,607	28.5%	590,163	31.8%	15,893	0.9%	1,856,461	1.2.25
2023	585,418	39.3%	468,773	31.5%	426,224	28.6%	8,307	0.6%	1,488,722	11.1.23
2022	687,710	36.6%	598,205	31.8%	577,740	30.8%	15,036	0.8%	1,878,691	11.1.22
2021	665,051	35.7%	610,600	32.8%	570,566	30.7%	15,206	0.8%	1,861,423	11.1.21
2020	719,591	34.3%	699,001	33.4%	659,488	31.5%	17,501	0.8%	2,095,581	11.2.20
2019	639,426	31.9%	612,611	30.5%	739,347	36.8%	16,177	0.8%	2,007,561	11.1.19
2018	649,944	32.3%	627,431	31.2%	719,889	35.8%	15,877	0.8%	2,013,141	11.1.18
2017	653,211	32.9%	605,064	30.4%	717,605	36.1%	12,458	0.6%	1,988,338	11.1.17
2016	662,167	33.2%	629,081	31.5%	694,005	34.8%	10,900	0.5%	1,996,153	11.1.16
2015	610,530	31.8%	583,913	30.4%	721,040	37.5%	7,330	0.4%	1,922,813	11.2.15
2014	620,353	32.0%	602,048	31.1%	709,447	36.6%	5,446	0.3%	1,937,294	11.3.14
2013	616,918	31.6%	616,295	31.6%	714,462	36.6%	3,100	0.2%	1,950,775	11.1.13
2012	629,443	32.2%	628,043	32.1%	694,558	35.5%	2,524	0.1%	1,954,568	11.1.12
2011	612,529	31.0%	645,700	32.7%	714,182	36.2%	2,169	0.1%	1,974,580	11.1.11
2010	618,614	31.2%	663,215	33.4%	701,320	35.3%	1,846	0.1%	1,984,995	11.1.10
2009	577,789	29.4%	682,641	34.7%	704,824	35.8%	1,478	0.1%	1,966,732	11.02.09
2008	592,397	29.6%	698,839	34.9%	711,705	35.5%	107	0.0%	2,003,048	11.1.08