Oberurnen is a former municipality in the Canton of Glarus in Switzerland . Effective from 1 January 2011, Oberurnen is part of the municipality of Glarus Nord .

Oberurnen is first mentioned in 1340 as Obern Urannen.

Oberurnen has an area, as of 2006, of 12.8 km2 (4.9 sq mi). Of this area, 45.2% is used for agricultural purposes, while 40.6% is forested. Of the rest of the land, 4.1% is settled (buildings or roads) and the remainder (10.2%) is non-productive (rivers, glaciers or mountains).