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 (1925–2012), automobile restorer and mechanic
- Percy Wyn-Harris (1903–1979), English mountaineer, political administrator, and yachtsman
- Watcyn Wyn (1844–1905), Welsh schoolmaster and poet
people with the given name:
- Wyn Belotte (born 1984), Canadian soccer player
- Wyn Calvin (1925–2022), veteran Welsh comedian and entertainer
- Wyn Cooper (born 1957), American poet
- Wyn Davies (born 1942), former professional Welsh football player
- Wyn Davies (conductor) (born 1952), 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 (1930–2013), Welsh Conservative politician
- Wyn Hou (born 1986), Canadian inventor and technologist
