Guam (Chamorro: Guåhån) is an island in the western Pacific Ocean, about three-quarters of the way from Hawaii to the Philippines. An unincorporated territory of the United States of America, Guam gets most of its visitors from East Asia, especially Japan.


Map of Guam — switch to interactive map
Map of Guam
  Northern Region
The Northern Region of Guam is comprised of large swaths of land controlled by the U.S. Military (primarily Andersen Air Force Base) toward the northernmost end of the island, and the villages of Dededo and Yigo just south of the military base. Dededo is by far the largest village on Guam, with a population exceeding 50,000. The Northern Region also contains Ritidian Beach, one of the most isolated, beautiful beaches in Guam.
  Central/Metropolitan Region
The Central Region holds the majority of Guam's villages and the island's international airport. A large number of shops, restaurants, and hotels are located in this area (primarily in the village of Tumon), and as such it is the island's most visited area by tourists. It is also the region of the island most prone to heavy traffic congestion around rush hour.
  Southern Region
Guam's Southern Region is mostly rural and picturesque. It is one of the most untouched and undeveloped areas on the island and the Chamorro culture is most preserved here. Cocos Island and the black sand beaches at Talofofo are popular places to visit in this region.



There are no cities on Guam with a population over 50,000 people, but each village represents an individual jurisdiction, all of which have mayors and limited autonomy within the central government. The largest population concentration is in the northern and central parts of the island, since the south is fairly lightly populated (the northernmost part of the island, however, is mostly owned by the US military).

Around 120,000 of the island's population of approximately 160,000 live in the northern and central parts of the island (including the villages of Tumon, Hagåtña, Dededo, Barrigada, Tamuning and Agana Heights).

Guam's Capital, Hagåtña
  • 1 Hagåtña (Agana) - the capital (pop. 1,100)
  • 2 Tumon - where most tourists head, on the central west of the island (part of Tamuning)
  • 3 Dededo - The most populous on Guam. (pop. 42,980)
  • 4 Tamuning - Guam's third-most populous city and most industrial. (pop. 18,012)
  • 5 Mangilao - Home to the University of Guam. (pop. 13,313)
  • 6 Talofofo - Village in the Jungles of Southern Guam. (pop. 3,215)

Other destinations

  • 1 War in the Pacific National Historical Park War in the Pacific National Historical Park on Wikipedia - former battlefields, gun emplacements, trenches, and historic structures all serve as silent reminders of the bloody World War II battles that ensued on Guam. While the park is known for its historical resources, the warm climate, sandy beaches, and turquoise waters attract visitors and residents. See Pacific War for background.
  • 2 Guam National Wildlife Refuge Guam National Wildlife Refuge on Wikipedia - wildlife refuge which protects Ritidian Point, the northernmost point of Guam.


Capital Hagåtña
Currency United States dollar (USD)
Population 153.8 thousand (2020)
Electricity 110 volt / 60 hertz (NEMA 1-15, NEMA 5-15)
Country code +1671
Time zone UTC+10:00
Emergencies 911
Driving side right

Guam is the largest and southernmost island in the Mariana Islands archipelago. While it shares strong linguistic and cultural similarities with the remaining islands of the archipelago, it is politically distinct: Guam is an unincorporated territory of the United States of America, while the remaining islands of the archipelago comprise the Commonwealth of the Northern Mariana Islands (CNMI). Guam and the CNMI are among thousands of islands in the Oceania subregion of Micronesia, which consists of the island nations of Belau (Palau), the Federated States of Micronesia (FSM), Kiribati (which has cultural affinities with Polynesia and Micronesia), the Marshall Islands, and several remote islands designated as the U.S.-administered islands of the Central Pacific.



Guam is thought to have been inhabited by people since about 4000 BC, when it was discovered by Southeast Asians, the distant ancestors of the local Chamorro people. Owing to a lack of written records, not much is known about the early Chamorro society, but the latte stones — a type of structure dating from that period — dot the island (and others in the Marianas). It's not certain how a Neolithic people with no knowledge of metals ever cut these stones, but they were most likely used as supports for the houses of the privileged class. Similarities between the latte stones and some wooden structures in the Philippines and Indonesia have been pointed out, and more imaginative minds might even see resemblances with the moai of Easter Island far to the east.

The first European contact came in 1521, with the Portuguese explorer Ferdinand Magellan on his famed circumnavigation of the world, sponsored by Spain. Having no counterpart of the western concept of "ownership" in their culture, curious Chamorro canoed out to Magellan's ship, relieving it of whatever they could get their hands on. As a result, Magellan named the islands Islas de los Ladrones, "islands of the thieves."

Spain claimed the island in 1565 and Christianity arrived soon after. Guam became one of the most favorable harbors in the trans-Pacific maritime routes, serving as a common port-of-call for the ocean-going galleons between Mexico and the Philippines, both major possessions of the global Spanish Empire then. It was around this time that the modern Chamorro culture started to take shape, when intermarriages between the locals, Filipinos, and the Spaniards were common.

Guam was ceded to the U.S. by Spain in 1898 after the Spanish-American War. Captured by Japan and its army in 1941, it was retaken by the U.S. after an occupation lasting three years, during which locals were often treated brutally as defeated enemies.

In 1950, Guam was elevated to the status of an organized territory, and all locals were granted American citizenship. In the 1960s, there was even briefly a discussion of forging all American possessions out in the Western Pacific (which included Guam, the Northern Mariana Islands, as well as now-independent Palau, Micronesia, and Marshall Islands) into a full-fledged U.S. state centered in Guam, the largest and most populous island of all between Japan, New Zealand, the Philippines, and Hawaii. However, this proposal was quickly dismissed by the Guamese, mainly due to their mistrust of their Chamorro brethren on the Northern Marianas, who loyally served the Japanese during the occupation of Guam (Northern Marianas had been a Japanese possession between World War I and the end of World War II, hence the Chamorro of Guam and the Chamorro of the Northern Marianas were on opposing sides).

As Guam is the westernmost point in the Pacific Ocean to fall within U.S. territory (so far west it's in the Eastern Hemisphere), the military installations on the island are some of the more strategically important U.S. bases in the Western Pacific.


Apra Harbor

The economy depends on U.S. military spending, tourism, and the export of fish and handicrafts. Total U.S. grants, wage payments, and procurement outlays amounted to $1 billion in 1998. Over the past 20 years, the tourist industry has grown rapidly, creating a construction boom for new hotels and the expansion of older ones. More than 1 million tourists visit Guam each year. The industry has suffered setbacks because of the continuing Japanese slowdown; the Japanese normally make up almost 90% of the tourists. However, Guam tourism is branching out to attract people from other Asian countries such as South Korea and China. Most food and industrial goods are imported. The possibility of a large military buildup has generated a lot of interest in increasing the tourist facilities on the island.



Guam enjoys a tropical marine climate: generally warm and humid, moderated by northeast trade winds. The dry season runs from January to June, the rainy season from July to December, though with little seasonal temperature variation. During the rains, squalls are common, though destructive typhoons are rare.



English and Chamorro are the official languages of Guam. Persons employed in the tourist industry will typically have a working knowledge of Japanese.

Get in


The entry requirements for Guam are largely the same as those for the U.S, and nationals of all countries not needing a visa to enter the U.S. do not need a visa to enter Guam, although they may require an ESTA travel authorization. Foreign citizens may enter Guam using one of three options:

  1. the U.S. Visa Waiver Program,
  2. the Guam-CNMI Visa Waiver Program or
  3. a valid U.S. visa.

If you are using the Guam-CNMI Visa Waiver Program, which applies in both Guam and the Northern Mariana Islands, you do not need to apply for a travel authorization prior to going. The Guam-CNMI Visa Waiver Program includes eight U.S.-VWP countries (Australia, Brunei, Japan, New Zealand, South Korea, Singapore, Taiwan and the United Kingdom) plus Hong Kong, Malaysia, Nauru and Papua New Guinea. Foreign citizens using the U.S.-VWP may stay 90 days, while citizens using the Guam-CNMI VWP may stay for 45 days. Mainland Chinese and Macau citizens in possession of a machine-readable passport, completed Form I-736 (Guam-CNMI Visa Waiver Information form) and Form I-94 (Arrival-Departure Record) may enter the CNMI only visa-free for up to 45 days, but not Guam, which still requires a visa in advance. Citizens of non-VWP countries must apply for a U.S. visa at any U.S. embassy.

Citizens of Canada do not require ESTA, Guam-CNMI Visa Waiver Program, or a U.S. visa to visit Guam for tourism or business for up to 6 months.

By plane


The main airline serving Guam is United Airlines, which offers non-stop service to Honolulu and Tokyo with onward connections from either airport to Los Angeles, Chicago, Denver, Houston, Newark, San Francisco, and Washington-Dulles. It also offers non-stop flights from Guam to most major cities in Japan, Hong Kong, Palau, Manila and Cebu in the Philippines, and many of the Federated States of Micronesia.

All other service to Guam is through East Asia on JAL (serving Tokyo only, as of Jan 2024), Jeju Air (Seoul), Jin Air (Seoul), Korean Air (Seoul), China Airlines (Taipei), Eva Air (Taipei) and Philippine Airlines (Manila). If you're departing from the mainland U.S., U.S. law prohibits the use of a foreign carrier to fly from the mainland U.S. to Guam, even on two separate tickets, so if you're transiting East Asia you should make sure that at least one segment of your journey is on a U.S. airline or leave at least 72 hours at your transit airport. From traveler reports, this is the minimum when transiting Seoul to avoid being denied boarding for the onward flight.

By boat


There is no regular ferry service to Guam, but cruise ships stop on various itineraries, generally as part of a Pacific crossing or world circumnavigation.

Get around

Marine Corps Drive/Route 1 in Tamuning, Guam

By car


Driving is fairly simple and similar to the mainland US. The main route on the island is Marine Corps Drive/Guam Route 1 (better known as Marine Drive). On main roads in Guam, expect congestion around rush hour; however, such delays, which rarely exceed 30 minutes, are not as bad as the traffic congestion experienced in larger cities stateside and around the world. Many people purchase vehicles described as "Guam Bombs" which are older vehicles that are great to get around in and affordable, though these are becoming less and less common as more people are buying newer cars.

  • Traffic safety: Island-wide, the speed limit is 35 mph (56 km/h). However, be careful and defensive while driving as it is common to see vehicles moving at far greater speeds, driving through red lights, tailgating, and cutting through traffic without signaling. The per-capita rate of traffic accidents far exceeds stateside rates (the U.S. national average is 19 crashes per 1,000 people, while Guam has 41 crashes per 1,000 people). Additionally, many of the older roads were paved using coral aggregate, causing them to be excessively slippery in rain. While these roads are slowly being replaced, they still exist - primarily in the southern part of the island - and can cause a vehicle to spin out even when driving under the speed limit; take caution.

By bus


Buses are available, through both private companies and the governmentally operated Guam Regional Transit Authority (GRTA). GRTA buses run island-wide, but are slow, difficult to navigate, and often unreliable. Limited operating hours mean that you may wait an hour or more for a GRTA bus, and connections to other bus lines may also incur equally long wait times. Private companies, however, operate their own trolley-style buses through the main tourist areas of Tumon (including all the major hotels) and loop through Micronesia Mall, K-Mart, Agana Mall, and Guam Premier Outlets.

By bike


Bicycling is most common in the Tumon tourist area, and, to a lesser extent, the length of the Hagåtña-Tamuning beachfront sidewalk. Bicycles are available for rent through most hotels and a number of local businesses. While bicycling is possible in other areas of the island, it is not common due to potholes, erratic driving, stray dogs, rainy weather, and hilly regions (in the southern part of the island). Due to these reasons, it is not recommended that one ride a bike outside of the Tumon and Hagåtña-Tamuning area unless they are experienced and skilled.

On foot


Walking is most common in the central business districts of Hagåtña and Tumon. Walking elsewhere around the island is uncommon due to heat, dangerous vehicular traffic, and the lack of sidewalks. Within villages, however, it is common to walk short distances between households, and to small villages stores, churches, mayoral offices, and other community meeting places.


Tumon Bay
  • Tumon is the center of tourism on Guam. Attractions include beaches that are also wildlife reserves, a large aquarium, and various shows similar to the ones in Las Vegas.
  • The coral reef surrounding Guam together with its underwater channels.


  • Diving in Guam – there are many shore and boat dive sites, mostly along the western coast of the island. The main dive shops catering to English speakers are MDA and Axe Murderer Tours. Signature dives include Blue Hole, an advanced dive through a reef chimney to the recreational depth maximum; and the wrecks of the SMS Cormoran II and Tokai Maru in Apra Harbor, thought to be the only place on Earth where wrecks from the First and Second World Wars touch.





Exchange rates for U.S. dollars

As of January 2024:

  • €1 ≈ $1.10
  • UK£1 ≈ $1.27
  • AU$1 ≈ $0.68
  • CA$1 ≈ $0.76
  • Japanese ¥100 ≈ $0.71

Exchange rates fluctuate. Current rates for these and other currencies are available from

Guam uses the U.S. dollar ("$", ISO currency code: USD). It is divided into 100 cents.



There are many retail outlets in Guam, including DFS (Duty Free Shoppers) which operates several stores in hotels, a large "Galleria," and a store in the Guam Airport. Further, visitors to Guam will note some of the same shopping opportunities available in the United States. Although there is no Wal-Mart, there is a large K-Mart that does a very high volume of business. Indeed, visitors who are used to the voided cavernous K-Marts in the U.S. may be surprised to find that they can barely squeeze through the aisles of the Guam K-Mart.

The Tumon Bay area has many duty-free shopping outlets and boutiques catering to Japanese tourists. Among these are boutiques selling Bvlgari, Chanel, Cartier, Dior, Fendi, Ferragamo, Gucci, Hermes, Louis Vuitton, Rolex, and more.

For U.S. citizens, Guam offers greatly increased customs exemptions coupled with duty and tax free importation of goods. However, take care with the prices offered in stores. A lot of merchandise has been shipped a very great distance at no small cost.



Despite its small population Guam has a range of restaurants, including Ya Mon's Jamaican Grill (locally owned & soon-to-be franchised), Hard Rock Cafe, Tony Romas and Chili's are in a building next the Guam Premier Outlets. Major hotels and restaurants serve continental meals and ethnic dishes.

Fresh seafood is bountiful. Fresh fish, octopus, and crab are either grilled or baked with vegetables or fruit, sashimi, and in other ways unique to the Pacific.

Travellers who venture further will find Chamorro, Japanese, Korean, Thai, Vietnamese, Filipino, Chinese, Mexican, and European restaurants, each with its own distinct ambiance. Chamorro Village offers a great variety of choices for local chamorro food, especially Wednesday nights. Of course, American fast food chains, such as Wendy's, Burger King, McDonald's, Taco Bell, Long John Silvers, Pizza Hut, Winchells Donuts and Dominos are common.

Locals pride themselves in barbecuing and it is a frequent event in Guam. Families and friends often get together and for BBQs, so if you visit ask about BBQs. It's a good chance you'll get invited!




Shopping avenue by night

The main tourist area is around Tumon Bay, which has a number of high-rise hotels and resorts similar to Waikiki Beach. Cheaper accommodations exist near the airport, especially around the village of Harmon. Be aware that Harmon hotels tend to be on the seedier side since Harmon is a mixed industrial/residential neighborhood. Many of the flights scheduled through Guam to other locations (especially in Asia) often require an overnight layover, so plan ahead. Some hotels offer airport pickup, as taxis can be quite expensive.



The University of Guam provides higher education opportunities for students on Guam, as well as providing higher education for much of Micronesia. The UOG is in Mangilao, on the central eastern side of Guam. Students can earn various undergraduate degrees and several programs offer degrees at the Masters level. Two of the better known Masters-level programs are the (1) Environmental Science Program, focusing on Agricultural sciences through the College of Agriculture and Life Sciences (CALS) and Hydrology and Water Resources through the Water and Environmental Research Institute of the Western Pacific (WERI); and (2) the Marine Laboratory, which focuses on marine biology and other environmental subjects.



The largest employers are the government of Guam and United Airlines, followed by a large duty-free retail firm (DFS Guam), the U.S. Federal Government, the hotel industry and services sectors. Guam has two large military bases and several smaller military installations that employ many people. The only U.S. Air Force base is Andersen Air Force Base on the northern tip of the island. Naval Station Guam is a large U.S. Navy station on the west-central part of the island near the village Agat.

Stay safe


For Emergencies Call 911.

Observe caution when engaged in water activities on Guam, as in any coastal area, as currents can be swift and unpredictable, depending on the season. NWS Guam issues a twice-daily Surf Zone Forecast which includes a forecast of expected rip current conditions on all beaches. During the rainy season (from about August until March), water can pool unevenly on road surfaces. Pooling of rain water can lead to flooding of roads in the southern half of Guam, which does not have sewer drainage built under the road surfaces. Furthermore, many roads are in disrepair and potholes are frequent, which can easily blow out tires. Violent crime is fairly low, but property crime tends to be high, so safeguard valuables in vehicles. Rental cars have stickers and can be targeted by thieves. Guam is in a major earthquake zone, and these occur every few years. That said, there have been few casualties to date.

Stay healthy


The civilian Guam Memorial Hospital is in Tamuning, in the Central Region. If you have access to military bases, there's a Naval Hospital.

Tap water is potable in Guam.

Hiking and swimming raises risk of contracting leptospirosis. Without treatment, leptospirosis can lead to kidney damage, meningitis, liver failure, trouble breathing, and death. It can take 2-20 days for symptoms to present from time of contraction. A few cases of leptospirosis are reported on Guam annually.


Chamorro Village

The Chamorro people, also known as the Chamoro or Chamoru, are indigenous to Guam. They possess a culture that mixes Asian, Spanish, and American cultures, and in general the people are gregarious and welcoming to visitors. Observe common courtesies and tend to err on the modest side, especially with clothing. Other cultures found in Guam include those from the Philippines, Japan, China, Korea, and other countries.

The Chamorro population is predominantly but not exclusively Catholic, with Protestantism also popular. On Guam, rosaries take the place of large formal gatherings to remember those who have passed away, and such congregations can occur for up to 20 years after someone has passed.





Guam participates in the North American Numbering Plan and the area code is (671). Mandatory 10-digit dialing is in effect, so calls must be dialed in the full 10-digit domestic format including area code, 671.

None of the major U.S. networks (AT&T, Verizon, and T-Mobile) have coverage in Guam. Telephone service is instead operated by locally-operated carriers Docomo Pacific, GTA, and IT&E. As of Dec 2020, Docomo Pacific has 5G while all three carriers have 4G and 3G service. Guam will be treated like an international country and you will be subject to roaming fees! As of Jan 2024, visitor SIMs are available from Docomo Pacific ($25 for 7 GB, unlimited local calls and texts, and 15 international minutes) and IT&E ($20 for 4 days or $30 for 8 days of unlimited local calls/SMS/data and $10 of international call credit). If those are not flexible enough for your needs, there are prepaid plans with varying lengths and data allowances.

If you are using a U.S. mainland carrier, check with your carrier to see if your plan will also cover roaming costs while in Guam. T-Mobile offers unlimited text and data (usually at 2G speeds) on most post-paid plans while AT&T and Verizon will make you pay to roam in Guam on a day-by-day basis or with pay-per-use rates. Going in the reverse direction, if you are planning on continuing to the mainland US after Guam, you will either be charged heavily for roaming (Docomo Pacific charges $10/day for data, $0.30 per minute, and $0.10 per SMS sent) or blocked altogether (IT&E, GTA).

Post office


Guam uses the U.S. Postal Service with zip codes 96910-96915; 96921 and 96929-96932 and a state code of "GU". Postage between Guam, the United States, Puerto Rico and overseas U.S. military & diplomatic installations (APO, FPO, DPO addresses) are the same domestic rates as it would be within Guam. However, international mail sent to Guam, especially if sent from the Asia-Pacific area, is best addressed to "Guam" as the destination country (as opposed to "USA") to avoid a long detour through North America, almost half the world away — literally.





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This country travel guide to Guam is an outline and may need more content. It has a template, but there is not enough information present. If there are Cities and Other destinations listed, they may not all be at usable status or there may not be a valid regional structure and a "Get in" section describing all of the typical ways to get here. Please plunge forward and help it grow!