Sel is a municipality in the north of Gudbrandsdalen in Oppland. It is bordered in the north to Dovre and Folldal, in the northeast to South Fron, in the east and south to Nord-Fron and in the west to Vågå. The name is pronounced Sell, with a short e, and comes from old Norwegian word Sil, meaning "silent running water in river or stream.
The municipality's Millennium Site is the Station Park. The municipality planted a special larch in the park.