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Union Membership Historical Table for Iowa

Union affiliation of employed wage and salary workers, Iowa, annual averages, 1989–2025 (numbers in thousands)
Year	Total employed	Members of unions(1)		Represented by unions(2)
Year	Total employed	Total	Percent of employed	Total	Percent of employed
1989	1,198	182	15.2	228	19.0
1990	1,149	177	15.4	230	20.0
1991	1,156	158	13.7	201	17.4
1992	1,239	166	13.4	205	16.5
1993	1,272	163	12.8	195	15.3
1994	—	—	—	—	—
1995	1,260	152	12.1	192	15.2
1996	1,293	169	13.0	203	15.7
1997	1,304	172	13.2	205	15.7
1998	1,333	166	12.5	197	14.8
1999	1,334	184	13.8	209	15.7
2000	1,341	177	13.2	211	15.7
2001	1,358	177	13.0	210	15.4
2002	1,389	154	11.1	190	13.7
2003	1,365	157	11.5	196	14.4
2004	1,345	141	10.5	171	12.7
2005	1,369	157	11.5	185	13.5
2006	1,424	161	11.3	199	14.0
2007	1,417	149	10.5	185	13.1
2008	1,437	153	10.6	187	13.0
2009	1,398	156	11.1	185	13.3
2010	1,393	158	11.4	192	13.8
2011	1,386	155	11.2	187	13.5
2012	1,390	145	10.4	172	12.4
2013	1,421	143	10.1	171	12.0
2014	1,459	156	10.7	184	12.6
2015	1,435	138	9.6	174	12.2
2016	1,454	129	8.9	153	10.5
2017	1,475	104	7.0	127	8.6
2018	1,461	113	7.7	129	8.8
2019	1,543	97	6.3	122	7.9
2020	1,401	93	6.6	128	9.1
2021	1,428	93	6.5	118	8.3
2022	1,506	105	7.0	132	8.7
2023	1,490	107	7.2	131	8.8
2024	1,437	93	6.4	119	8.3
2025(3)	1,478	101	6.8	122	8.2
Footnotes: (1) Data refer to members of a labor union or an employee association similar to a union. (2) Data refer to both union members and workers who report no union affiliation but whose jobs are covered by a union or an employee association contract. (3) 2025 annual estimates are 11-month averages that exclude October. Data for October 2025 were not collected due to the federal government shutdown.
Note: Data refer to the sole or principal job of full- and part-time wage and salary workers. All self-employed workers are excluded, both those with incorporated businesses as well as those with unincorporated businesses. Updated population controls are introduced annually with the release of January data. Dashes indicate data not available. Source: Current Population Survey The current population survey is a monthly survey of households conducted by the Bureau of the Census for the Bureau of Labor Statistics.

Midwest Information Office

Union Membership Historical Table for Iowa