Luleå is a city on the coast of northern Sweden, and the capital of Norrbotten County, the northernmost county in Sweden. Luleå has 48,728 inhabitants in its urban core as of 2018 and is the seat of Luleå Municipality with a total population of about 79,000 as of 2023. Luleå is Sweden's 25th largest city and Norrbotten County's largest city. Luleå is considered as the world's largest brackish water archipelago with 1,312 islands, several rivers and vast forestland.

Norrbotten County is the northernmost county or län of Sweden. It is also the largest county by land area, almost a quarter of Sweden's total area. It shares borders with Västerbotten County to the southwest, the Gulf of Bothnia to the southeast, the counties of Nordland and Troms in Norway to the northwest, and Lapland Province in Finland to the northeast.