Jimmy Oyvind Nilsen (born 16 November 1966) is a former international motorcycle speedway rider from Sweden.

Nilsen topped the Swindon league averages in 1987 and finished fourth again at the 1987 World Final at the Amsterdam Olympic Stadium in the Netherlands.

Nilsen finished 5th in the 1990 Individual Speedway World Championship in Bradford, England (won by Jonsson).

Also in 1990 after appearing in a "Rest of the World" team in a test against Australia at the North Arm Speedway in Adelaide, Nilsen won the inaugural running of the Jack Young Memorial Cup, named in honour of Jack Young.

[9] Nilsen later qualified for the Speedway Grand Prix in 1997, 1998, 1999, 2000 and 2001, finishing a career best 2nd in 1998 behind countryman Tony Rickardsson.