Hammerfest, also known as Hámmárfeasta, serves as the administrative centre of Hammerfest Municipality in Finnmark county, Norway. It is situated on the northwestern coast of the island of Kvaløya, positioned just north of Rypefjord and southwest of Forsøl. The town occupies a 3.02-square-kilometre area on the northwestern coast, establishing it as a significant settlement in northern Norway.

The location was an important fishing and Arctic hunting settlement long before receiving market town rights by royal decree of Christian VII of Denmark–Norway in 1789. It has endured multiple destructions, including a British sack in 1809, a devastating fire in 1890, and systematic burning by retreating German forces in 1944-45. Despite these events, it remains one of the oldest towns in northern Norway.

The town features an ice-free harbour and the nearby island of Melkøya, which hosts a natural gas processing station connected via the Melkøysund Tunnel. The main church is Hammerfest Church, originally built in 1684, while the modern 1961 Church of Hammerfest offers striking architecture. The terrain is notably barren due to the tree line being below sea level, giving the area a distinct look compared to the rest of Norway.

Hammerfest claims to be the northernmost city in the world, though this title is disputed by Honningsvåg. It is considered one of the capitals of Sami culture and attracts tourists seeking the midnight sun from May to July or northern lights during the polar night from November to January. The town also experiences significant reindeer migration through its streets each summer.

The population was 8,010 as of 2025, with a 2023 count of 7,882 within the town limits. The economy is supported by gas extraction from the Snøhvit field and tourism, including cruise ships and winter visitors. Access is available via Widerøe flights from Tromsø, buses to Alta, and the Hurtigruten coastal steamer, which docks at an industrial port near the centre.