Physical Address

Department of Earth & Planetary Sciences
Olin Hall
3300 San Martin Drive
Baltimore, MD 21218

Mailing Address

Recipient’s Name
Department of Earth and Planetary Sciences, Dept. Code P3901
The Johns Hopkins University
3400 North Charles Street
Baltimore, MD 21218-2687

The department code is not required, but including it will allow the mail room to find your recipient more easily.