Wyn is a Welsh surname and given name. Notable people with the name include:

people with the surname:

• A. A. Wyn (1898–1967), American magazine publisher
• Aled Wyn Davies (born 1974), classical tenor from Powys, Wales
• Alun Wyn Davies, Welsh rugby union footballer
• Alun Wyn Jones (born 1985), Welsh rugby union player
• Cerith Wyn Evans (born 1958), conceptual artist, sculptor and film maker
• Dyfed Wyn-Evans (born 1969), baritone opera singer who grew up in Wales
• Owain Wyn Evans (born 1984), Welsh meteorologist, and drummer; weather presenter for the BBC
• Eirug Wyn (1950–2004), Welsh satirical novelist who wrote in Welsh
• Eliseus Williams (Eifion Wyn) (1867–1926), Welsh language poet
• Elizabeth Wyn Wood (1903–1966), Canadian sculptor, born in Orillia
• Emyr Wyn Lewis (born 1982), Welsh rugby union footballer
• Eurig Wyn (1944–2019), Welsh politician
• Geraint Wyn Davies (born 1957), Welsh-Canadian actor
• Hedd Wyn (1887–1917), Merionethshire farmer and Welsh language poet of World War I
• Ieuan Wyn Jones, AM (born 1949), leader of Plaid Cymru, Deputy First Minister
• Llewelyn Wyn Griffith (1890–1977), Welsh novelist
• Nesta Wyn Ellis, Welsh politician and writer
• Owen Wyn Owen, automobile restorer and mechanic
• Percy Wyn-Harris (1903–1979), English mountaineer, political administrator, and yachtsman

people with the given name:

• Wyn Belotte (born 1984), Canadian soccer player
• Wyn Calvin (born 1926), veteran Welsh comedian and entertainer
• Wyn Cooper, American poet
• Wyn Davies (born 1942), former professional Welsh football player
• Wyn Davies (conductor) a Welsh conductor
• Ieuan Wyn Jones (born 1949), Welsh politician, Plaid Cymru member
• Wyn Morris (1929–2010), Welsh conductor
• Wyn Roberts, Baron Roberts of Conwy (born 1930), Welsh Conservative politician