Dean Fearn (born 12 January 2008) is a Scottish competitive swimmer representing Great Britain and Scotland internationally, and specializing in butterfly and backstroke. He is a World Junior champion in the 50 m butterfly and a multi-medalist at the 2025 World Junior and 2024 and 2025 European Junior Championships.
Fearn trains with the Aberdeen Dolphins under coach Laura Bowie.
In 2023, he represented Great Britain at the European Youth Olympic Festival in Maribor, Slovenia, and later won gold in the 50 m butterfly at the 2023 Commonwealth Youth Games in Trinidad and Tobago.
At the 2024 British Swimming Championships, Fearn set three Scottish junior records and achieved European Junior qualification standards
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Fearn attends Lathallan School in Scotland.