The logo was adopted on 8 November 1979, and it shows the god Ullr of Norse mythology holding a bow and three arrows.

[5] Ullensaker borders with Eidsvoll to the north, Nes to the east, Sørum to the south, and Gjerdrum and Nannestad to the west.

The municipality has two major population centres: the village of Kløfta and the city of Jessheim, the latter one houses the administration center of Ullensaker.

Ullensaker has had a huge population increase over the past fifty years.

The recent increase is partly attributed to the founding of Oslo Airport, Gardermoen.