This figure is a thematic map of the United States that shows the share of employees who were union members in each state in 2023. States in darker indigo have higher shares, while states in lighter shades have smaller shares. In some states, more than one-in-five wage and salary earners are union members. Hawaii is the state with the highest share of union members at 21.8 percent, while South Carolina has the lowest share, with just 1.7 percent of employees saying they are members of a union.