| Olaf Kortner | |
| Office: | Minister of Education and Church Affairs |
| Term Start: | 28 August 1963 |
| Term End: | 25 September 1963 |
| Primeminister: | John Lyng |
| Predecessor: | Helge Sivertsen |
| Successor: | Helge Sivertsen |
| Office2: | Deputy Member of the Norwegian Parliament |
| Term Start2: | 1 October 1965 |
| Term End2: | 30 September 1973 |
| Constituency2: | Oslo |
| Office3: | Leader of the Young Liberals |
| Term Start3: | 1948 |
| Term End3: | 1950 |
| Predecessor3: | Helge Rognlien |
| Successor3: | Jon Ola Norbom |
| Birth Name: | Olaf Erling Kortner |
| Birth Date: | 10 May 1920 |
| Birth Place: | Skien, Telemark, Norway |
| Death Place: | Oslo, Norway |
| Nationality: | Norwegian |
| Party: | Liberal |
Olaf Erling Kortner (10 May 1920 - 26 January 1998) was a Norwegian politician for the Liberal Party.
He was born in Skien.
From 1948 to 1950 he was the leader of the Young Liberals of Norway, the youth wing of the Liberal Party.
He was a member of Strinda municipality council in the period 1951 - 1955. From August to September 1963 he served as the Minister of Education and Church Affairs during the short-lived centre-right cabinet of John Lyng.
He served in the position of deputy representative to the Norwegian Parliament from Oslo during the terms 1965 - 1969 and 1969 - 1973. During parts of these terms, from 1965 to 1970, he met as a regular representative for Helge Seip while he was appointed to the cabinet Borten.
A cand.philol. by education (1948), he worked as a teacher in Strinda and Oslo from 1950 to 1970. From 1971 to 1990 he headed the school administration in Akershus.