APO

Geography & Places abbreviation · US Territory and Military Mail

APO
Stands forArmy Post Office
CategoriesGeography & Places

APO stands for Army Post Office, a US territory and military mail abbreviation also used in general use.

Written in place of a city name on mail to US Army and Air Force personnel overseas, as in APO AE 09001. Items travel at domestic postage rates to a US gateway, where the Military Postal Service takes over delivery to bases worldwide.

Example: SPC Maria Lopez, Unit 3050 Box 0123, APO AE 09136

Usage notes

On an envelope APO goes in the city position and AA, AE or AP in the state position, followed by the ZIP code; never add the host country, or the item may be routed into foreign mail. The service is often described as Army/Air Post Office because it serves both branches. Numbered APOs in World War II concealed unit locations.

More US territory and military mail abbreviations

  • AA – Armed Forces Americas
  • AE – Armed Forces Europe
  • AP – Armed Forces Pacific
  • AS – American Samoa
  • CMR – Community Mail Room
  • CNMI – Commonwealth of the Northern Mariana Islands
  • CZ – Canal Zone
  • DPO – Diplomatic Post Office
  • FPO – Fleet Post Office
  • GU – Guam
  • MP – Northern Mariana Islands
  • MPSA – Military Postal Service Agency

See all 18 US territory and military mail abbreviations →