Janse is a surname of the following people
Axel Janse (1888–1973), Swedish gymnastDon Janse (?-1999), American vocal director and arrangerJens Janse (born 1986), Dutch football playerJoseph Janse (1909–1985), Duth-American chiropractorLilian Janse (born 1973), Dutch politicianMark Janse (born 1959), Dutch linguistOlov Janse (1892–1985), Swedish archaeologistAlbert Janse Ryckman (1642–1737), American businessman and politicianJaco Janse van Vuuren, paralympic athlete from South Africa