Krenn is a surname. Notable people with the surname include:
- Franz Krenn, Austrian composer
- Gert Krenn, Austrian bobsledder
- Harald W. Krenn, Austrian biologist
- Kurt Krenn, (1936-2014), Austrian Catholic bishop
- Sherrie Austin (born Sherrie Krenn), Australian actress and singer
- Werner Krenn, Austrian tenor
See also
- Kren
- Dominique Crenn, a French chef
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