Gardermoen is an area in the municipality of Ullensaker in Akershus, Norway. In 1998, it had a population of 259 people. Oslo Airport, Gardermoen, Gardermoen Air Station, Norwegian Armed Forces Aircraft Collection and Oslo Airport Station (train station) are located in the area.

Gardermoen is a compound of the farm name Garder and the finite form of mo m 'moor; drill ground' (thus 'the moor belonging to the farm Garder'). The farm is first mentioned in 1328 (Garõar), and the name is the plural of Norse garõr m 'fence'. The meaning is probably 'enclosure; fenced fields'.