Duch is a surname.
- Miroslav Duch (born 1979) is a Czech ski mountaineer
- Rhys Duch (born 1986) is a lacrosse player for the Vancouver Stealth of the National Lacrosse
- Bolesław Bronisław Duch (1885–1980) was a Polish Major General. He served during World War I, 1914–18, in the Polish Legions
- Sophea Duch is a popular Karaoke song artist
- Jaume Duch Guillot (born 1962) is the spokesperson of the European Parliament