Contact Us

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

Media queries can be submitted to our press contacts, listed here.

Member and donation inquiries can be directed to [email protected] or to our Member Line, (800) 666-8276.

Contact forms

National headquarters

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

Washington, D.C., office

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

West Coast office

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

Midwest office

200 East Randolph Street, Suite 5151
Chicago, IL 60601
Phone: (312) 578-1750