Carl Gustav Sparre Olsen (April 25, 1903 – November 8, 1984) was a Norwegian violinist and composer.
Starting in 1934, he accepted a teaching position at Griegakademiet, the music conservatory in Bergen, Norway.
Olsen wrote a significant amount of large choral pieces, orchestral works, and songs.
In the 1930s, he composed large instrumental works inspired by Norwegian poet Olav Aukrust.
He also wrote Nine Wood-reliefs with Colours, music for paintings by Norwegian painter and sculptor Dagfinn Werenskiold (1892–1977) .
When Sparre Olsen died in Lillehammer during 1984, his urn was set down at the Lom stave church in Gudbrandsdal.