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 Bluesky, or by submitting one of our contact forms.

Contact forms

General inquiries (English) / Contáctenos (español)
Request a speaker
Reuse permission requests
Website feedback

Member, donation, and general inquiries

Member, donation, and all general inquiries can be directed to member@ucs.org or to our member line, (617) 301-8000.

Media and press inquiries

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

National headquarters

Two Brattle Square
Cambridge, MA 02138-3780

Washington, DC, office

1350 I St NW, Suite 400,
Washington, DC 20005-7201

(note: Our DC offices are on I Street, pronounced Eye, not 1st street)

West Coast office

2001 Addison Street, Suite 200
Berkeley, CA 94704

Midwest office

200 East Randolph Street, Suite 5151
Chicago, IL 60601