Unique Zip+4 numbers have been assigned to all individual departments here at The Citadel. This Zip+4 number is used in postal processing, but it does not help to identify your department when sorting incoming mail. Each department should still use their Department’s name in their complete return address. The “official” address of The Citadel is: 171 Moultrie Street, Charleston SC 29409-0002 (or your respective department’s four digit add-on). However, it is essential that individuals use a proper name, a MSC # and/or a Department along with the above address to ensure prompt delivery and adequate processing of all incoming mail. If you do not see your department listed below, please call The Citadel Post Office at 953-7690 or 953-6778 to let us know.