Unions

• International Labour Organization:
  • Industrial Relations Data (IRData) - "...includes data on trade union density and collective bargaining coverage." Accessible through ILOSTAT.
  • "The UNIONS database contains statistics on trade union membership for 63 countries. These statistics are taken from official national statistical publications."
• ILO Bureau of Statistics: Statistics of Trade Union Membership (2010, unpublished)

"Data for 49 countries taken mainly from national statistical publications" - includes contact information for sources​

• OECD.stat: Trade union density, Union members and employees

• Union Membership, Bureau of Labor Statistics - economic news release and tables
  • also Data Retrieval Tool for historical data (time series varies by table)

• Union Membership and Coverage Database,  constructed and updated by Barry Hirsch and David Macpherson 

• Table created from the Current Population Survey for median weekly earnings of full-time wage and salary workers by union affiliation and selected characteristics (age, sex, race, Hispanic or Latino ethnicity) from 2000 forward.
  • Other union-related Current Population Survey data