Gunnar Sethil (28 November 1872 – 20 March 1941) was a Norwegian trade unionist and politician for the Labour Party.
[2] From 1902 to 1905 he chaired the local trade union Kristiania Sten- og Cementarbeiderforening.
[1] He was a manager in the Norwegian Confederation of Trade Unions from 1906 to 1907, and a member of its secretariat from 1903 to 1920 and 1923 to 1927.
After 1918, they were a part of the social democratic opposition in the labour movement.
[4] He served as a deputy representative to the Parliament of Norway from Grunerløkken during the terms 1916–1918[5] and 1919–1921.