Ottar Landfald (18 May 1919 – 28 December 2009) is a Norwegian politician for the Centre Party.
He was born in Verdal.
He was elected to the Norwegian Parliament from Hedmark in 1973, and was re-elected on one occasion.
He had previously served as a deputy representative during the term 1969–1973.
On the local level he was a member of the executive committee of Stange municipal council from 1955 to 1968.
From 1963 to 1966 he was also a member of Hedmark county council.
He chaired the county party chapter from 1966 to 1974.
Outside politics was a farmer.
He was active in the Norwegian Agrarian Association.