The following list is accurate to the best of our knowledge. The addresses for IWW GHQ and the dates for that location are provided in chronological order with the earliest addresses listed first.
Chicago, Illinois, USA (1905 - 1990)
- 148 West Madison Street, Chicago (Mid 1905 - October 1906).
- Bush Temple, Rooms 310 and 212, Chicago (October 1906 - 1909).
- Cambridge Building, Room 518, 160 North Fifth Avenue, Chicago (1910 - November 1912).
- Mortimer Building, Room 307, 164 West Washington Street, Chicago (December 1912 - June 1917).
- 1001 West Madison Street, Chicago (July 1917 - March 1925).
- 3333 Belmont Avenue, Chicago (April 1925 - December 1927).
- 555 West Lake Street, Chicago (January 1928 - March 1933).
- 2422 North Halsted Street, Chicago, IL 60614 (April 1933 - February. 1970).
- 2440 North Lincoln Avenue, Chicago, IL 60614 (March 1970 - January 1973).
- 752 West Webster Avenue, Chicago, LI 60614 (February 1973 - 1979).
- 3435 North Sheffield Avenue, Suite 202, Chicago, IL 60657 (1980 - 1990).
San Francisco, California, USA (1991 - 1994)
- Grant Building, 1095 Market Street, Suite 204, San Francisco, CA 94103 (1991 - 1994).
Ypsilanti, Michigan, USA (1995 - 1999)
- 103 West Michigan Avenue, Ypsilanti, MI 48197 (1995 - 1999).
Philadelphia, Pennsylvania, USA (2000 - 2005)
- PO Box 13476, Philadelphia, PA 19101, USA, 215-222-1905 (2000 - 2005)
Cincinnati, Ohio, USA (2006 - 2009)
- 4001 Hamilton Avenue, Cincinnati, OH 45223, USA (2006 - 2009)
Chicago, Illinois, USA (2010 - Present)
- West Irving Park Road, Chicago, IL 60618, USA (2010 - 2012)
