In 2008, 29 states and the District of Columbia had union membership rates below that of the U.S. average, 12.4 percent, while 20 states had higher rates, and 1 state had the same rate.
Six states had union membership rates below 5.0 percent in 2008, with North Carolina having the lowest rate (3.5 percent). The next lowest rates were recorded in Georgia (3.7 percent), South Carolina (3.9 percent), Virginia (4.1 percent), Texas (4.5 percent), and Louisiana (4.6 percent).
Three states had union membership rates over 20.0 percent in 2008—New York (24.9 percent), Hawaii (24.3 percent), and Alaska (23.5 percent).
Bureau of Labor Statistics, U.S. Department of Labor, The Economics Daily, Union membership by state, 2008 at https://www.bls.gov/opub/ted/2009/feb/wk1/art02.htm (visited December 06, 2022).