You cannot reach Papua New Guinea's capital by road.
No road links Port Moresby to Lae or Madang: the national network is not joined up and everything arrives by air or sea. A city of dry hills and stilt villages that works like an island inside its own country.
01 A capital with no road to its country
Papua New Guinea's national road system does not form a continuous network. Port Moresby, on the south-west coast of the Papuan peninsula, has no direct sealed connection to Lae or Madang on the north coast, nor to the mountainous interior.
Internal flights fill that gap, which is why Jacksons airport is not merely the country's largest: it is the infrastructure holding it together. The two main airlines are based there, and from there run the links to the cities you cannot drive to.
The consequence for a visitor is immediate. There is no such thing as arriving overland or carrying on by bus: every leg of the country is a flight, and the capital works like an island inside its own territory.
02 An anchorage named after an admiral
In February 1873, Captain John Moresby, commanding HMS Basilisk, was charting the southern coast of New Guinea when he entered a deep, sheltered bay. He named the harbour after his father, Admiral Fairfax Moresby, and marked the anchorage off Paga Hill on his charts as Port Moresby.
The place was already inhabited. The Motu and the Koita had been there for centuries: the first a coastal people, the second come down from the inland hills, with considerable intermarriage between them. The largest settlement was Hanuabada, which was in fact five villages.
In 1885 Commissioner Peter Scratchley chose the site as the colonial capital, and in 1886 a surveyor laid out a grid between the harbour and Ela Beach. The modern city grew from that grid, wedged into the saddle between Paga and Tuaguba hills.
03 The houses still standing in the water
The first thing you notice from the air are the houses built on stilts inside the bay, lined up along walkways running out from the shore. They are not a picturesque leftover: they are the Motu villages, and they are still lived in.
The traditional owners of the ground the capital stands on are represented by their own assembly, created by act of parliament, which administers the land and inhabitants of ten recognised villages. It is the only institution of its kind in the country, and its chair also serves as deputy governor of the Capital District.
It is worth carrying that in your head as you move around the city: much of the urban ground is not vacant land but land with traditional owners who still act as such.
04 From a hundred and twenty thousand to three quarters of a million
Modern growth has been fast and recent. The 1980 census returned 120,000 inhabitants; 1990, 195,000; 2011, 364,145; and the 2024 census, 756,754 people in the National Capital District.
That growth spread in patches. After independence in 1975, the new suburb of Waigani absorbed the administrative and cultural functions — the National Museum and the National Library are there — while the historic centre was left as an office district.
The result is a polycentric, very spread-out city: Boroko, once the commercial heart, Gordons, Gerehu, Koki with its fresh produce market, Waigani with the ministries. None of that is walked between: it is driven.
05 How to read the city
Port Moresby is not part of the Central Province that surrounds it: it forms the National Capital District, with three local-level governments. Administratively, it is another island on the map.
Physically it is a city of bare hills, yellow grass and eucalypts, which surprises anyone arriving expecting the jungle of New Guinea. That landscape has a climatic explanation that deserves a chapter of its own.
The way to read it is this: an anchorage a captain found in 1873, a colonial grid on the saddle between two hills, stilt villages that never moved, a ministry district raised after independence and, around all of it, a country you can only reach by flying.
