It is part of the Norwegian Church and belongs to Østre Romerike deanery in Diocese of Borg.

The Medieval era church burned in 1918, the walls repaired in 1936, floors and ceilings in 1948.

[4] The municipality (originally the parish) is named after the old Sørum farm (Old Norse: Suðrheimr), since the first church was built here.

The rose is derived from the arms of the medieval dynasty of Sudreim (Sudreimsætten), one of the most influential noble families in Norway at the time.

To the north Sørum bordered the municipality of Ullensaker, to the east Nes and Aurskog-Høland, in the south Fet, and the west Skedsmo and Gjerdrum.