Carsten Walfrid Thunborg (2 June 1918, Tyssedal, Odda, Norway - 22 December 2000) was a Swedish politician.
He was an organizer of the Swedish Construction Workers Union.
He served as chairman of Harsprånget Communist Labour Commune 1948 to 1951.
He was a board member of the Stockholm Communist Labour Commune 1955–1958, and a member of the national party board 1958–1967 (included in the party Executive Committee 1964–1967).
[1] Thunborg became a member of parliament in 1968, following the death of Axel Jansson.