Lasse Thoresen (born 18 October 1949) is a Norwegian composer whose works concentrate on a contemporary transformation of the folk-music traditions of many peoples, especially those of Scandinavia.

Thoresen was born in Oslo in 1949 and studied with Finn Mortensen at the Norwegian Academy of Music, graduating in 1972.

[1] Thoresen has received many commissions for works which have been performed across Scandinavia, including commissions from all the major Norwegian Philharmonic Orchestras and the French National Radio.

[2] An important source of inspiration for Thoresen has been the Baháʼí religion whose texts he has set in many works.

[2] His oratorio Terraces of Light (2000) was performed at the inauguration of the 19 terraces of the Baháʼí holy place on Mount Carmel, by forces from Canada, Austria, Israel and Transylvania.