Lunner is a municipality in Akershus county, Norway. It is part of the traditional region of Hadeland. The administrative centre of the municipality is the village of Roa. Lunner was established when it was separated from Jevnaker Municipality on 1 January 1898. From 1 January 2020 the municipality belonged to Viken county and afterwards it was handed over to its successor Akershus. It was in Oppland before that.