Nore og Uvdal is a municipality in Viken county, Norway. It is part of the traditional region of Numedal. The administrative centre of the municipality is the village of Rødberg. The area of Nore was separated from the municipality of Rollag in 1858. The municipality of Nore was divided into two municipalities on 1 January 1901: Nore and Uvdal. These two municipalities were merged back together on 1 January 1962, and the new municipality was called Nore og Uvdal.