Trygve Knudsen (23 June 1897 – 18 January 1968) was a Norwegian philologist, linguist and lexicographer.

[1] Knudsen finished his secondary education in Tønsberg 1916, and enrolled in philology at the University of Kristiania.

From 1935 he worked as a teacher at Oslo Cathedral School, until 1946, when he started lecturing at the University.

[1] Knudsen was co-editor of the dictionary Norsk Riksmålsordbok from 1925, together with Alf Sommerfelt, who had started the work in 1922.

He was a radio speaker, especially on the subject "Norwegian language", and he held guest lectures at the universities of Bergen, Lund, Uppsala and Göteborg.