Krohn is the surname of several people:
Lars Monrad-Krohn, a Norwegian engineer
Kristin Krohn Devold, a Norwegian politician
Michael Krohn (musician), a Norwegian musician
Leena Krohn, a Finnish author
Irina Krohn, a Finnish member of Parliament
Aino Krohn, a Finnish author better known as Aino Kallas
Juan María Fernández y Krohn, Catholic priest, would-be assassin
Kenneth Krohn, co-developer of the Krohn–Rhodes theory
Ramble John Krohn, an American hip hop producer also known as RJD2
Tracy Krohn, owner of Krohn Racing/TRG
August David Krohn, a Russian zoologist
Julius Krohn, nephew of August, fennoman and folklorist
Kaarle Krohn, Finnish folklorist, son of Julius
Katherine Elizabeth Krohn, German-born American author
Ilmari Krohn, Finnish composer and musicologist, son of Julius
Felix Krohn, Finnish composer, son of Ilmari
Jasmin Krohn (b. 1966), Swedish speed skater
Jonathan Krohn, American journalist and writer
Paysach Krohn, rabbi
Michael Krohn-Dehli (b. 1983), Danish footballer
Christine Krohn, a German Federal Court Justice
Tim Krohn, recipient of the 1994 Conrad-Ferdinand-Meyer-Preis
Rebecca Krohn, New York City Ballet soloist
Dankert Krohn (1842–1906), Norwegian businessman active in Portugal with the Krohn Port wine company
Michael Krohn (1793–1878)
Hans-Broder Krohn (1915–2009), European politician (Director for Agricultural Economics with the European Commission)
Henrik Krohn (1826–1879) Norwegian poet, magazine editor and proponent for Nynorsk language
Chester A. Krohn, American politician