Torpa is a former municipality in Oppland county, Norway.
It was created by a split from Nordre Land on 1 January 1914. At that time Torpa had a population of 2,219. On 1 January 1962 Torpa was reincorporated into Nordre Land. Prior to the merger Torpa had a population of 2,620.
Torpa constitutes the northern part of the Nordre Land community. Torpa bordering municipalities Etnedal and Nord-Aurdal in the west, Gausdal, Lillehammer and Gjøvik in the east. Torpa is only a few miles from Dokka.
The Norse form of the name was Þorp. The meaning of the word þorp n in this old district name is probably 'pasture, grazing land'.
Until 1918 the name was written "Torpen".