Each year the BLS puts out a report on union members (linked below). The most recent report notes that the “The 2022 unionization rate (10.1 percent) is the lowest on record” (since 1983). Private sector membership is only 6.5%.
Men continue to have a higher union membership rate (10.5%) than women (9.6%) and blacks are more likely to be union members.
Weekly wages are higher for the unionized by some $187 ($1,216 versus $1,029) but union dues reduce the differential. At the same time, while non-union wages increased by 24% over the past five years, union wages rose by just under 17%.