Ola O. Røssum (10 May 1926, Nord-Fron – 29 May 2012) was a Norwegian politician who was a member of the Centre Party.
He was elected to the Norwegian Parliament from Oppland in 1969, and was re-elected on two occasions.
He studied at the Norwegian College of Agriculture from 1956 to 1959, and was then research assistant there for one year.
From 1960 he worked for the Norwegian Agrarian Association; from 1965 to 1998 he was employed as a farmer.
This article about a Norwegian politician born in the 1920s is a stub.