Here are a few ways you can contact the U.S. Department of the Interior, the Secretary and our bureaus:
Department of the Interior
1849 C Street, N.W.
Washington DC 20240
Phone (with employee directory): (202) 208-3100
Or use this Feedback Form. We use it in place of email, to help prevent phishing and other malicious attacks. But rest assured, our form goes to actual human beings.