This is a list of Norwegian football transfers in the 2021 summer transfer window by club. Only clubs of the 2021 Eliteserien and 2021 1. divisjon are included.
The summer transfer window lasted from 1 August to 31 August. The deadline for signing players on a free transfer was 26 September. In addition, young players up to and including 21 years of age may be loaned until 16 October, and junior players may be promoted to the senior squad at any time.
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