Svend Asmussen (28 February 1916 – 7 February 2017) was a Danish jazz violinist, known as "The Fiddling Viking". A Swing style virtuoso, he played and recorded with many of the other jazz musicians, including Duke Ellington, Benny Goodman and Stephane Grappelli.

He played publicly until 2010 when he had a blood clot, his career having spanned eight decades. Asmussen was born in Copenhagen, Denmark, was raised in a musical family, and started taking violin lessons at the age of seven. Aged 16 he first heard recordings by jazz violinist Joe Venuti and began to emulate his style.