Thörnell, Thornell or Törnell is a Swedish surname that may refer to:
Olof Thörnell (1877–1977), Swedish Army general John F. Thornell Jr. (1921–1998), American United States Air Force officer Jack R. Thornell (1939–2026), American photographer Monica Törnell (born 1954), Swedish singer and songwriter Max Thornell (born 1970), Swedish musician Kristel Thornell (born 1975), Australian novelist John Thornell (athlete) (born 1985), Australian long jumper