Union Membership by State

In the early 1970s, one in four American workers belong to a labor union. Last year, they represented about 12 percent of the workforce, according to the Bureau of Labor Statistics. 

This map shows membership by state, with darker shades representing higher proportions of the workforce in unions. North Carolina has the lowest percentage of union workers: 3.2 percent. New York has the highest: 24.2 percent. 

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This map has the same data, but in an interactive format: 

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Source: Bureau of Labor Statistics | Download data