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Union Membership Historical Table for South Dakota

Union affiliation of employed wage and salary workers, South Dakota, 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	269	22	8.1	34	12.6
1990	257	21	8.4	29	11.3
1991	264	23	8.8	31	11.7
1992	277	25	8.9	31	11.3
1993	283	22	7.9	30	10.7
1994	—	—	—	—	—
1995	291	22	7.7	27	9.4
1996	312	23	7.4	29	9.2
1997	306	21	6.9	26	8.6
1998	324	21	6.4	26	8.0
1999	332	20	6.0	26	7.8
2000	333	19	5.6	23	6.9
2001	341	20	5.9	25	7.4
2002	349	19	5.6	24	6.9
2003	353	19	5.4	23	6.4
2004	347	21	6.0	27	7.7
2005	350	21	5.9	29	8.2
2006	351	21	5.9	25	7.2
2007	354	23	6.5	27	7.7
2008	369	18	5.0	24	6.4
2009	357	20	5.5	24	6.6
2010	357	20	5.6	24	6.6
2011	359	18	5.1	23	6.5
2012	351	20	5.6	24	6.7
2013	362	17	4.8	21	5.8
2014	363	18	4.9	22	6.0
2015	382	22	5.9	26	6.9
2016	379	20	5.2	26	7.0
2017	380	20	5.4	25	6.7
2018	387	22	5.6	28	7.1
2019	395	22	5.6	26	6.7
2020	385	17	4.3	21	5.5
2021	393	16	4.0	20	5.0
2022	412	13	3.1	17	4.2
2023	425	15	3.6	18	4.2
2024	431	12	2.7	16	3.7
2025(3)	415	10	2.3	13	3.1
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 South Dakota