'''Krenn''' is a surname. Notable people with the surname include:
* Franz Krenn (1816–1897), Austrian composer * Gert Krenn, Austrian bobsledder * Harald W. Krenn (born 1958), Austrian biologist * Kurt Krenn, (1936-2014), Austrian Catholic bishop * Sherrie Austin (born Sherrie Krenn), Australian actress and singer * Veit Krenn (born 1960), American-born, German pathologist of Austrian origin * Werner Krenn (born 1943), Austrian tenor
== See also == * Kren * Dominique Crenn, a French chef
{{surname|Krenn}}