What and Where Is Palau?

Palau is a small island nation in the western Pacific Ocean, part of the Caroline Islands chain in the region known as Micronesia. The country is made up of roughly 340 islands, islets, and atolls, only nine of which are permanently inhabited, and has a population of approximately 18,000 people, most living in or around Koror, Palau’s largest city and former capital. According to Palau’s national government, the islands sit less than 2,000 miles south of Japan, isolated enough to preserve unusually intact reef systems but close enough to major shipping and flight routes to draw a steady stream of international visitors.

Geography of Palau: Islands, Reefs, and Terrain

Palau’s islands form the exposed summit of an undersea volcanic ridge, and nearly all of them are wrapped in a barrier and fringing coral reef system that has shaped both the country’s ecology and its history. Research from the University of Hawaii’s Pacific Islands Ocean Observing System puts Palau’s total land area at about 495 square kilometers, with a highest point of roughly 287 meters on Babeldaob, the country’s largest island. The national capital, Ngerulmud, sits on Babeldaob in Melekeok State, a seat of government established in the 2000s to replace Koror, which remains Palau’s commercial and population hub.

South of Babeldaob lies the country’s most distinctive landscape feature: the Rock Islands Southern Lagoon, a cluster of 445 uninhabited limestone islands rising out of turquoise water in dome and mushroom-like shapes carved by wave action at their base. UNESCO’s World Heritage Centre describes the property as covering more than 100,000 hectares of core area with an additional buffer zone of roughly 164,000 hectares, all within Koror State.

A Brief History of Palau

People have lived in the Palau archipelago for roughly 3,000 to 5,000 years, and archaeological remains in the Rock Islands, including stone villages abandoned in the 17th and 18th centuries, document how early Palauans adapted their settlements to a marginal marine environment over many generations. European contact arrived through Spain, which claimed the islands as part of the Spanish East Indies. After Spain’s defeat in the Spanish-American War of 1898, it sold its remaining Pacific island claims, Palau included, to Germany, whose administrators mined phosphate on Angaur and built cable-cart tracks on Babeldaob that still exist today.

Japan took control of Palau during World War I and administered it afterward as a League of Nations mandate, developing Koror into a regional colonial center before the islands became one of the deadliest battlegrounds of World War II. From September to November 1944, US Marine and Army forces fought Japanese defenders on the small island of Peleliu in an operation meant to secure the flank of the American advance toward the Philippines. According to the US Naval History and Heritage Command, the fighting killed 1,544 Americans and wounded nearly 6,900 more, while almost 11,000 Japanese soldiers died, a toll historians have long debated given the island’s limited strategic payoff in the war’s final year.

After Japan’s defeat, the United Nations placed Palau under United States administration as part of the Trust Territory of the Pacific Islands, established in 1947. Palau was the last of the trust territory’s districts to settle on its political future, adopting its own constitution and, after several referenda, approving a Compact of Free Association with the United States. That compact entered into force on October 1, 1994, the same day Palau became a fully sovereign nation and joined the United Nations.

Government and Economy in Brief

Palau is a constitutional republic in free association with the United States. Voters elect a president and vice president separately to four-year terms, along with a bicameral national legislature, the Olbiil Era Kelulau, made up of a Senate and a House of Delegates. The national government’s own description of its structure notes a judiciary consisting of a Supreme Court, a Court of Common Pleas, and a Land Court, operating alongside a Council of Chiefs drawn from the highest traditional chiefs of Palau’s 16 states, which advises the president on customary law. Each of those 16 states elects its own governor and local legislature.

Under the Compact of Free Association, the United States funds a substantial share of Palau’s government budget and defends the country’s territory in exchange for military access to Palau’s land and waters. Grant revenue tied to the compact equaled roughly a quarter of Palau’s GDP in fiscal year 2020, according to an International Monetary Fund assessment of the Palauan economy. The rest of the economy leans heavily on tourism: in fiscal year 2019, tourism-related activity accounted for more than a third of GDP, and nominal GDP stood at about $258 million, or roughly $14,800 per person, in fiscal year 2020. When the COVID-19 pandemic halted international travel, visitor arrivals collapsed from more than 41,000 in fiscal year 2020 to about 3,000 the following year, a swing that exposed just how tightly the country’s finances are tied to travelers drawn to its reefs.

Culture and People of Palau

Palauan society is traditionally matrilineal. According to the Encyclopedia of World Cultures, land, clan titles, and wealth have historically passed down through the mother’s line, and senior women within each clan have long held the authority to select, and remove, the male titleholders who represent that clan publicly. The basic kinship unit is the telungalek, an extended family descended from one woman, and important life events, from a first birth to a funeral, are marked by structured, communal exchanges of food, money, and traditional valuables among an extended network of relatives.

Palauan and English are both official languages, and many older Palauans also speak Japanese, a legacy of the colonial period; the Palauan language itself carries loanwords from Spanish, German, Japanese, and English. Most Palauans identify as Roman Catholic or Protestant, alongside a smaller but culturally significant following of Modekngei, an indigenous religious movement that blends Christian and traditional Palauan belief.

What Palau Is Best Known For

Internationally, Palau’s reputation rests almost entirely on its ocean. At the center of it is the Rock Islands Southern Lagoon, inscribed by UNESCO as a World Heritage Site in 2012 for both its natural and cultural value. The property protects more than 385 coral species and 746 fish species, along with at least 13 shark species, dugongs, and every bird and mammal species endemic to Palau. It also holds the densest known concentration of marine lakes on the planet, more than 50 bodies of seawater cut off from the open ocean, each one functioning as a natural laboratory where isolated populations evolve along their own path, most famously in the lake whose resident jellyfish have lost most of their ability to sting.

That concentration of biodiversity underpins Palau’s long-standing reputation as one of the world’s premier scuba diving destinations, a status reflected directly in the economic data: tourism built around reef diving and snorkeling has repeatedly made up more than a third of the country’s entire economic output, a dependence few other nations share to the same degree.

Why Palau Matters Globally

Palau has turned its reef wealth into some of the most ambitious ocean policy in the world. In 2009 it created the world’s first national shark sanctuary, banning commercial shark fishing across its entire exclusive economic zone, according to NOAA’s Office of National Marine Sanctuaries. In 2015 the government went further, enacting the Palau National Marine Sanctuary, which closes about 80 percent of that same maritime territory, an area larger than the US state of California, to all fishing and mining, reserving the remaining fifth for domestic fishing. The United Nations Development Programme counts it among the largest fully protected marine areas on Earth, designed in part to safeguard migratory routes for tuna and other commercially important fish stocks across the wider Pacific.

Palau has also tried to reshape how visitors behave once they arrive. Since December 2017, every arriving passport has been stamped with the Palau Pledge, a commitment each incoming visitor signs to act responsibly toward the environment during their stay, described by National Geographic as the first policy of its kind written directly into a country’s entry process. Taken together, Palau’s marine protections and its conservation-first approach to tourism have made a nation of roughly 18,000 people a reference point in international conversations about ocean stewardship, well beyond what its size alone would suggest.

Key Takeaways

• Palau is a western Pacific nation of roughly 340 islands in the Caroline Islands chain, with about 18,000 people concentrated mainly around Koror.
• Palau became fully independent from the United States on October 1, 1994, under a Compact of Free Association that still shapes its defense and economy.
• The Rock Islands Southern Lagoon, a UNESCO World Heritage Site since 2012, protects hundreds of limestone islands, the world’s densest cluster of marine lakes, and immense coral reef biodiversity.
• Tourism built around Palau’s reefs has historically generated more than a third of national GDP, alongside grant funding tied to the US Compact of Free Association.
• Palau created the world’s first national shark sanctuary in 2009 and, in 2015, one of the largest fully protected marine reserves on Earth, covering about 80 percent of its exclusive economic zone.
• Since December 2017, every visitor has signed the Palau Pledge, a passport-stamped environmental commitment described as the first of its kind in the world.

Sources

• UNESCO World Heritage Centre: Rock Islands Southern Lagoon
• UNEP-WCMC World Heritage Datasheet: Rock Islands Southern Lagoon
• Republic of Palau National Government: Who We Are
• Republic of Palau National Government: About Palau
• U.S. Department of the Interior, Office of Insular Affairs: Republic of Palau
• U.S. Department of State, Office of the Historian: Palau
• U.S. Naval History and Heritage Command: Operation Stalemate II, The Battle of Peleliu
• International Monetary Fund Article IV Consultation Report on Palau (hosted by the Asian Development Bank)
• Pacific Islands Ocean Observing System, University of Hawaii: Region Palau
• NOAA Office of National Marine Sanctuaries: A Tale of Two Sanctuaries
• United Nations Development Programme: New Strategy Highlights the Scientific Priorities of the Palau National Marine Sanctuary
• National Geographic: Palau Now Requires an “Eco-Pledge” from All Visitors to Help Preserve the Land
• Encyclopedia of World Cultures: Culture of Palau

Editorially reviewed by Specialty Digest Editorial TeamLast reviewed September 28, 2026Researched and drafted with AI assistanceReport an issue