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The union membership rate—the percentage of wage and salary workers who were members of unions—was 11.1 percent in 2015, unchanged from 2014. From 2014 to 2015, union membership rates increased in 24 states and the District of Columbia, declined in 23 states, and were unchanged in 3 states.
In 2015, 30 states and the District of Columbia had union membership rates below that of the U.S. average, 11.1 percent, and 20 states had rates above it.
Five states had union membership rates below 5.0 percent in 2015: South Carolina (2.1 percent), North Carolina (3.0 percent), Utah (3.9 percent), Georgia (4.0 percent), and Texas (4.5 percent). Two states had union membership rates over 20.0 percent in 2015: New York (24.7 percent) and Hawaii (20.4 percent).
These data are from the Current Population Survey. To learn more, see "Union Members — 2015" (HTML) (PDF). The numbers exclude all self-employed workers.
Bureau of Labor Statistics, U.S. Department of Labor, The Economics Daily, Union membership rates by state, 2015 at https://www.bls.gov/opub/ted/2016/union-membership-rates-by-state-2015.htm (visited June 06, 2023).