Kollumerland en Nieuwkruisland (population: 13,192) is a municipality in the northern Netherlands, in the province of Friesland. The municipality covers an area of 116.35 km² (of which 6.40 km² water).
The municipality of Kollumerland en Nieuwkruisland consists of the following towns, villages and townships: Augsbuurt, Burum, Kollum, Kollumerpomp, Kollumerzwaag, Munnekezijl, Oudwoude, Triemen, Veenklooster, Warfstermolen, Westergeest, Zwagerbosch.