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Guam Postal Code

Guam is an organized, unincorporated territory of the United States in Micronesia which is the sub-region of the western Pacific Ocean. Hagatna is the capital city and Dededo is the largest city of Guam. The other major cities and towns in Guam are Dededo Village, Yigo Village, Tamuning-Tumon-Harmon Village, Mangilao Village, Barrigada Village, Santa Rita, Mongmong-Toto-Maite Village, Chalan Pago-Ordot Village, Yona Village, Agat Village, Agana Heights Village, Talofofo Village, etc.

The official languages of the country in Guam are English and Chamorro. The other spoken languages in Guam are Spanish, Japanese, etc. Guam is well known for its unique way of celebrating its festivals like Marianas Cup Beach Volleyball Festival, Guam Discovery Day, Malojloj Fiesta, Liberation Day, Gupot Y Peskadot, Pastries in Paradise, etc. Many foreigners or travelers also take part in the celebration and enjoy it.

The official name of the postal service in Guam is Guam Guard Mail. The postal service in Guam was introduced in 1899 and the name Guam Guard Mail was adopted on 9 July 1930. At first, there was so much controversy over the places which were registered under the postal code office, but then slowly every region in Guam got its postal codes. The pin code is segregated in such a way that each of the postal codes is.

Land Area

Guam has a total land area of 540 km2, which comes to around a total of 210 mi2. The territory of Guam is divided into 19 Municipal villages namely, Agana Heights, Asan-Maina, Barrigada, Chalan Pago-Ordot, Dededo, Hagat, Hagatha, Humatak, Inalanan, Malesso, Mangilao, Mongmong-Toto-Maite, Piti, Santa Rita-Sumai, Sinajana, Talofofo, Tamuning, Yigo, and Yona. It was further subdivided into cities, municipalities, towns, and villages.

Water Area

Guam has major sources of water including groundwater, lakes, rainwater, rivers, snow, soil moisture springs, streams, water, waterfall, wetlands, etc. Guam has more than two lakes and a few water bodies. Some water bodies have developed as tourist spots. Many water bodies are small in area and contain a minimum volume of water. Most of these water bodies are fresh water and very few are salt lakes.


Guam contains more than 106 named mountains. The highest peak and the most prominent mountain is Mount Lamlam which is about 406 meters (1,332 feet). The other major mountains in Guam are Mount Jumullong Manglo, Mount Almagosa, Mount Bolanos, Mount Ilicho, Mount Sasalaguan, Mount Alutom, Mount Schroeder, Mount Chachao, Mount Taene, etc.

Postal Stamps

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List of postal and courier services in Guam :

  • DHL Express Service Point
  • Bakersfield Intl Guam
  • Aduana Guam Freight Forwarders
  • Dededo Mail Center

Guam PostalCode Details

Location Postal Code
Agana 96910 , 96932
Agana Heights 96910 , 96919
Agat 96928
Barrigada 96921 , 96913
Chalan Pago 96910
Dededo 96912 , 96929
Dededo 96929
Hagatna 96910 , 96932
Harmon 96913
Inarajan 96915
Mangilao 96923 , 96913
Merizo 96916 , 96915
Mongmong 96910
Ordot 96910
Piti 96915
Santa Rita 96915
Sinajana 96910
Talofofo 96915
Tamuning 96931
Tiyan 96913
Tumon 96913
Umatac 96915
Yigo 96929
Yona 96915

Guam PostalCode
Coding method XX-- (First two digit) ---> indicate the ISO country code.
X-- (third digit) ---> indicates the Island code.
XX-- (Last two digit) ---> indicate the section code.
Address format Each administrative division maintains its postal code for mail delivery purposes. Having the correct code is essential to your mail delivery. The official name of the Guam postal service is Guam Guard Mail. The postal service in Guam was introduced in 1899. The territory of Guam is divided into 19 Municipal villages. Guam has more than 21 zip codes.
Guam uses a five-digit numeric postal code system in which the first two digits, third, and the last two digits have different indicates which are shown below;
Examples Mr. Smith james(addressee)
1500 E-MAIN AVE STE 201 (street)
Agana 96910(locality , postcode)
GUAM (country)

Frequently asked questions (FAQ) s

  • How many digits are found in the Guam postal code?
    There are nine digits found in the Guam postal code.
  • What is the postal code of the capital city of Guam?
    Hagatna is the capital city of Guam and its postal code is 96932-0001.
  • Name the official postal service in Guam.
    The official postal service in Guam is Guam Guard Mail.
  • How many postal codes are in Guam?
    Guam has more than 21 postal codes.
  • Give the alpha three-letter country code of Guam.
    The alpha three-letter country code of Guam is GUM.