Ole Anton Sæther (9 December 1936 – 8 January 2013) was a Norwegian entomologist.

[1] He was scientific assistant and university lecturer at Department of Limnology, University of Oslo, from 1960 to 1966; research scientist at Freshwater Institute, Winnipeg, Manitoba, Canada from 1966 to 1977; and professor of systematic zoology in the Museum of Zoology at the University of Bergen from 1977 to his retirement in 2006.

He penned about 265 academic publications (more than 5,500 pages); authored or co-authored 3 subfamilies, 42 genera or subgenera, and more than 300 species; and was a member of the editorial board of the journals Aquatic Insects and Acta Zoologicae Academiae Scientarum Hungaricae.

[2] The festschrift Contributions to the Systematics and Ecology of Aquatic Diptera: A Tribute to Ole A. Sæther was released for his seventieth birthday.

His contributions to the database Fauna Europaea, as an expert on Chironomidae,[4] were much appreciated.