John Lyng was a member of the Free-minded Liberal Party but changed to the Conservative Party he was also elected to the Norwegian Parliament
Lyng was originally a member of the Free-minded Liberal Party, heading the local party chapter from 1934 to 1935. He was a member of the executive committee of Trondheim city council from 1934 to 1940 and in 1945, but had changed to the Conservative Party in 1938, heading the party chapter in Trondheim until 1947. Lyng was elected to the Norwegian Parliament from the Market towns of Sr-Trndelag and Nord-Trndelag counties in 1945, and was re-elected in 1949. 
