United States

The United States Antarctic Program operates 3 permanently manned bases in the Antarctic: Palmer Station, Amundsen-Scott South Pole Station and McMurdo Station. Palmer is the smallest permanent American base and resides within the Chilean/Argentinian/British claim and Amundsen-Scott is the only Antarctic base located at the South Pole. McMurdo is a huge year round base in the Ross Dependency with a summer population of just over 1200. It is the largest base in the Antarctic. Mailing addresses can be found here.

Philatelic Mail Clerk McMurdo Station, Antarctica PSC 769 APO AP 96599-1035 UNITED STATES Philatelic Mail Clerk Amundsen-Scott South Pole Station, Antarctica PSC 768 Box 400 APO AP 96598 UNITED STATES Philatelic Mail Clerk Palmer Station, Antarctica c/o Damco Deposito Franco Antartico P.O. Box 60-D Punta Arenas CHILE

Note that McMurdo and Amundsen-Scott are APO (Army Post Office) addresses and you can treat them as being addresses in the United States. However Palmer Station mail is routed through Chile so when sending your mail there be sure to use the correct international postage rate.

Mail from Palmer station will be postmarked at the station. It is carried back to the states and mailed from there.