Karsten Ingemann Torkildsen (18 December 1896 – 26 February 1979) was a Norwegian trade unionist and politician for the Labour Party.

He also held this post in 1924 and 1925, and was deputy chair of Rjukan Labour Party in 1920.

He moved to Notodden where he chaired the local party chapter from 1931 to 1934 and the co-op from 1933 to 1934.

As such was also a secretariat member of the Norwegian Confederation of Trade Unions.

Here, in 1942 he was elected as chair of the exiled branch of the Norwegian People's Aid.