Mortensen or Mortenson (in US) is a surname of Danish and Norwegian origin, meaning son of Morten. The Swedish variant is Mårtensson. Mortensen is currently the 20th most common surname in Denmark.
It may refer to the following people:
Arne Mortensen (1900–1942), Norwegian rower
Beverly Mortensen, American musician and composer
Carlos Mortensen (born 1972), professional poker from Ecuador
Christian Mortensen (1882–1998), Danish-American supercentenarian
Chris Mortensen (born 1951), American journalist
Dale T. Mortensen (1939–2014), American economist
Finn Mortensen (1922–1983), Norwegian classical composer
Greg Mortenson (born 1957), American humanitarian
Hans Christian Cornelius Mortensen (1856–1921), Danish teacher and ornithologist
Jess Mortensen (1907–1962), American NCAA champion track athlete and coach
Malene Mortensen (born 1982), Danish singer
Ole Mortensen (born 1958), Danish cricketer
Ole Theodor Jensen Mortensen (1868–1952), Danish professor of zoology
Scott Mortensen, American politician
Stan Mortensen (1921–1991), English professional footballer
Viggo Mortensen (born 1958), Danish-American actor, poet, musician, photographer and painter
Marilyn Monroe (1926–1962), born Norma Jeane Mortenson
