Contact Us

The Union of Concerned Scientists maintains offices across the United States. Get in touch by phone or mail (listed below), via Facebook or Twitter, or by submitting one of our contact forms.

Contact forms

National headquarters

Two Brattle Square
Cambridge, MA 02138-3780
Phone: (617) 547-5552
Fax: (617) 864-9405

Washington, D.C., office

1825 K St. NW, Suite 800
Washington, D.C. 20006-1232
Phone: (202) 223-6133
Fax: (202) 223-6162

West Coast office

500 12th St., Suite 340
Oakland, CA 94607-4087
Phone: (510) 843-1872
Fax: (510) 451-3785

Midwest office

One N. LaSalle St., Suite 1904
Chicago, IL 60602-4064
Phone: (312) 578-1750
Fax: (312) 578-1751