Johannsen

Johannsen is a surname. Notable people with the surname include:


 * Anton Johannsen (1872–1929), German-American labor militant
 * Franz Johannsen (1921–2006), German sprint canoeist
 * Gunnar Johannsen (born 1940), German cyberneticist, and Professor of Systems Engineering and Human-Machine Systems
 * Hans Johannsen (1913–1961), German chief engineer on a U-boat in World War II
 * Helmuth Johannsen (1920–1998), German football coach
 * Jake Johannsen (born 1960), American comedian
 * Kristoffer Johannsen (born 1977), Danish former professional football player
 * Kurt Johannsen (bush mechanic) (1915–2002), Australian mechanic
 * Kyle Johannsen, Canadian philosopher
 * Nicholas Johannsen, German-American amateur economist
 * Oskar Augustus Johannsen (1870–1961), American entomologist, specialist of Diptera
 * Wilhelm Johannsen (1857–1927), Danish botanist, plant physiologist and geneticist