With a population of 14,379 inhabitants (18,805 including Kjeller),[1] it is the administrative centre of Lillestrøm Municipality in Akershus County, and lies within the traditional district of Romerike.

Lillestrøm's history dates back to the times river powered sawmills came into use for the production of building materials.

However, the almost non-existent property values were judged to be a fair exchange and so the workers started living and settling in the area around the sawmill, and Lillestrøm was born.

[2] In 1997, Skedsmo municipal council declared Lillestrøm to be a town (by) in its own right (an honorary status which has no effect upon the organization of local government).

[3] Today, the airfield is used mainly by light aircraft, and major air traffic is routed to the international airport at Gardermoen (opened 1998).

In November 2016, the Norwegian government decided that they would close the airfield by 2023 and plans to redevelop the land for housing and small businesses.

During the 70s, the club went through the divisions with back-to-back promotions before eventually winning the double in 1977, largely thanks to their legendary player Tom Lund.

There are also two indoor arenas, one multi-purpose (Skedsmohallen) and one for football (LSK-Hallen), and in 2007 a track and field stadium Romerike Friidrettsstadion was built as a cooperation between the municipalities Skedsmo, Rælingen and Lørenskog.