Stockholm Arlanda Airport (IATA: ARN, ICAO: ESSA), is an international airport located in the Sigtuna Municipality of Sweden, near the town of Märsta, 37 km (23 miles) north of Stockholm and nearly 40 km (25 mi) south-east of Uppsala.

The airport is located within Stockholm County and the province of Uppland. It is the largest airport in Sweden, the third largest airport in the Nordic countries. The airport is the major gateway for international air travel in large parts of Sweden. Arlanda Airport was used by close to 22.5 million passengers in 2014, with 17 million international passengers and 5 million domestic. By January 2015, Stockholm Arlanda Airport saw a 30% pax growth over 5 years, top growth among European airports.

Stockholm Arlanda Airport is the larger of Stockholm's two airports. (Stockholm–Bromma is located north-west of the city's centre, but can be used only by a small number of smaller aircraft.) The tiny airports in Nyköping and Västerås are located at least 100 km away from the Swedish capital.