The World's Smallest Capital Cities by Population

When we think of capitals, we often picture grand, sprawling cities — massive metropolises filled with embassies, government buildings, and millions of people. But many of the world's national capitals are tiny, sometimes almost impossibly so. Some are purpose-built administrative centers surrounded by farmland. Some are islands with thousands of residents. One is essentially a palace complex. Here are the world's smallest capital cities by population, each one a geography quiz challenge waiting to happen.

The Smallest Capitals on Earth (1–5)

1. Ngerulmud (Palau) — approximately 400 residents
Ngerulmud became the capital of Palau in 2006 when the government relocated from Koror to this purpose-built facility on Babeldaob Island. With only about 400 permanent residents — primarily government officials and support staff — it is the least populous national capital city on Earth. The move was intended to decentralize development and create space for a planned administrative center, but the city has seen minimal growth since the initial government buildings were constructed. Most of Palau's 18,000 residents continue to live in and around Koror, the country's commercial center.

2. Yaren (Nauru) — approximately 1,100 residents
Nauru is the third-smallest country in the world by area, and its de facto capital, Yaren, is correspondingly tiny. Technically Nauru has no officially designated capital — government functions are distributed across several districts — but Yaren is generally recognised as the de facto seat of government because it houses the country's parliament building, airstrip, and main government offices. The entire island of Nauru has about 10,000 residents.

3. Vatican City — approximately 800 residents
Vatican City is simultaneously a city, a capital, and a sovereign nation — the smallest of all three by area (0.44 sq km) and the smallest by population among sovereign states. The approximately 800 residents are mostly clergy, Swiss Guards, and Vatican employees. As the headquarters of the Roman Catholic Church, Vatican City hosts millions of visitors annually, but its permanent residential population remains extraordinarily small.

4. San Marino (City of San Marino) — approximately 4,500 residents
San Marino City is the capital of the Most Serene Republic of San Marino, one of the world's oldest republics (founded in 301 AD). The city sits atop Monte Titano within Italy, entirely surrounded by Italian territory. San Marino City's historic center, with its three medieval towers, is a UNESCO World Heritage Site and receives far more visitors than it has permanent residents.

5. Funafuti (Tuvalu) — approximately 6,000 residents
Funafuti is an atoll — a ring of coral surrounding a lagoon — and the capital of Tuvalu, one of the world's smallest and lowest-lying nations. The entire atoll's land area is less than 3 square kilometres, making it one of the most densely populated places on Earth despite its small absolute population. Tuvalu faces an existential threat from rising sea levels.

Small But Notable Capitals (6–10)

6. Valletta (Malta) — approximately 6,500 residents
Valletta is the smallest EU national capital by area, covering just 0.8 square kilometres on a small peninsula in Malta's Grand Harbour. Despite its tiny resident population, Valletta is a dense hub of government and cultural activity. The city was founded by the Knights of St John in 1566 and its entire historic urban fabric is a UNESCO World Heritage Site. During daytime hours it receives hundreds of thousands of visitors.

7. Palikir (Micronesia) — approximately 7,000 residents
The capital of the Federated States of Micronesia, Palikir is a small planned government center on the island of Pohnpei. Like Ngerulmud in Palau, Palikir was purpose-built to serve as an administrative capital for a scattered island nation. The FSM's population of about 115,000 is spread across many islands throughout Micronesia.

8. Vaduz (Liechtenstein) — approximately 5,700 residents
Liechtenstein is the world's only doubly landlocked country (surrounded by countries that are themselves landlocked — Austria and Switzerland). Its capital, Vaduz, is a small Rhine valley town dominated by the medieval Vaduz Castle, which is still the residence of the ruling Prince of Liechtenstein. Despite its small size, Liechtenstein has one of the world's highest GDPs per capita.

9. Majuro (Marshall Islands) — approximately 28,000 residents
Majuro is an atoll capital in the central Pacific, home to about 75% of the Marshall Islands' total population. Like Tuvalu, the Marshall Islands are extremely vulnerable to sea level rise, and the government has begun purchasing land in Fiji as a potential relocation site. The atoll is barely 3 metres above sea level at its highest point.

10. Tarawa (Kiribati) — approximately 60,000 residents in South Tarawa
South Tarawa is the capital of Kiribati (pronounced "Kiribas"), another Pacific island nation threatened by sea level rise. The atoll capital is densely populated and sits only about 2 metres above sea level at its highest. Kiribati spans four time zones and crosses the International Date Line, making it the country that experiences the new year first.

Honourable Mentions (11–15)

11. Belmopan (Belize) — approximately 22,000 residents
Belize moved its capital from Belize City to the purpose-built inland city of Belmopan in 1970, after Hurricane Hattie devastated the coastal capital in 1961. Belmopan was designed as a model capital but has grown slowly, with most of Belize's population and commercial activity still concentrated in Belize City.

12. Andorra la Vella (Andorra) — approximately 22,500 residents
The highest-elevation capital in Europe at 1,023 metres, Andorra la Vella is the capital of the tiny Pyrenean principality of Andorra, jointly ruled by the French President and the Bishop of Urgell. The city is known for duty-free shopping and skiing.

13. Roseau (Dominica) — approximately 16,000 residents
Not to be confused with the Dominican Republic, Dominica is a separate Caribbean island nation. Its capital Roseau is a small, picturesque port town with limited infrastructure but extraordinary natural beauty — Dominica is known as the "Nature Isle of the Caribbean."

14. Basseterre (Saint Kitts and Nevis) — approximately 14,000 residents
The capital of the smallest sovereign state in the Americas, Basseterre is a charming colonial town on the island of Saint Kitts. Saint Kitts and Nevis has a total population of about 53,000 across its two islands.

15. Nuku'alofa (Tonga) — approximately 23,000 residents
The capital of the Kingdom of Tonga, Nuku'alofa sits on the island of Tongatapu and is the home of the royal palace. Tonga is one of the last remaining monarchies in the Pacific.

Why Small Capitals Matter for Geography Quizzes

Small capitals appear disproportionately often in geography quiz difficulty rankings because they require specific, often counterintuitive knowledge. When playing Capitalle, encountering Ngerulmud, Yaren, or Funafuti as the day's answer is the mark of a hard puzzle day. The small Pacific island capitals in particular — Ngerulmud, Yaren, Funafuti, Palikir, Majuro, Tarawa — are clustered in a vast ocean area and require specific country-capital memorization rather than geographic deduction.

The best strategy for these small capitals in Capitalle is to learn them as special cases: memorize the Micronesian and Polynesian capitals as a distinct group, the Caribbean micro-state capitals as another group, and the European micro-state capitals (Vatican, San Marino, Vaduz, Andorra la Vella) as a third. Within each group, use process of elimination once the distance hints from your guesses place you in the right oceanic or continental zone.