John Olav Larssen (7 March 1927 – 2 January 2009) was a Norwegian evangelical preacher and missionary.
He was born in Hellvik, and settled in Bryne. He started as a preacher at the age of eighteen, and eventually began touring Norway.[1] He has been nicknamed "Norway's Billy Graham".[2] Books written by Larssen include En åpen dør (1957), Elsket av Gud (1961), Fra høvelbenk til misjonsmark (1964), Kraft fra det høye (1968), and Gud vil vekkelse (1970).[3]