|Post Office Boxes and Mail Code Listings
Each area of campus has a sortable list of post office boxes. When a box number is shown, be sure to use the post office box address, not the street address, for all mail coming in to Yale.
All U.S. mail should use the following address format:
Yale University (or Yale School of Medicine)
PO Box _ _ _ _ _ _ (a 6-digit number)
New Haven, CT 06520- _ _ _ _ (last 4 digits of PO Box#)