Jens Evald Enevoldsen-Elsing (23 September 1907– 23 May 1980) was a Danish chess master born in Copenhagen who won the Danish Chess Championship five times (1940, 1943, 1947, 1948, and 1960). In 1939 he shared first but lost a playoff, and in 1950 he again shared first but lost a lottery.
He took 4th at Helsinki 1947 (zonal, Eero Böök and Gösta Stoltz won).
Enevoldsen played for Denmark eleven times in Chess Olympiads (1933, 1935, 1937, 1939, 1950, 1952, 1956, 1958, 1966, 1970, and 1972).
He was awarded the International Master (IM) title in 1950 and was made an International Arbiter (IA) in 1960.
Jens Enevoldsen has authored several Danish Books on Chess:
- Jens Enevoldsen, Det Positionelle Angreb
- Jens Enevoldsen, Lærebog i Skak:
- Begyndelsesgrundene
- Første Del: Aabningsspillet, Jespersen og Pios Forlag, (1941)
- Anden Del: Midtspillet
- Tredie Del: Slutspillet I-II