The municipality (originally the parish) is named after the old Ullensaker farm. The name is first recorded in 1300 as Ullinshof.
The first element is the genitive case of the name Ullinn (a sideform of Ullr). The last element was originally hof which means "temple", but this was later (around 1500 AD) changed to aker meaning "acre" or "field".
Ullensaker does not have an heraldic coat-of-arms properly granted. The municipality uses a non-heraldic badge that is from modern times. The logo was adopted on 8 November 1979, and it shows the god Ullr of Norse mythology holding a bow and three arrows. The colors on the logo can vary.[5]
Ullensaker has had a huge population increase over the past fifty years. This increase has been slightly accelerating over the past few years. From 2000 to 2007, the population of Ullensaker increased by almost 6,000 people. The recent increase is partly attributed to the founding of Oslo Airport, Gardermoen.[6]
History
Raknehaugen, the largest burial mound in the Nordic countries, has been carbon dated to around 550; the age of the mound is disputed.[7]
Gardermoen Culture Park - An area close to Gardermoen Airport, which serves as the Norwegian Air Force's airplane collection and the Scandinavian Airlines Museum's location.
^https://snl.no/Raknehaugen "Det har rådd uenighet om dateringen av Raknehaugen. C14-dateringer utført på materiale fra haugen tyder imidlertid på at gravhaugen ble oppført sent i folkevandringstiden, kanskje omkring 550 evt."