Tonnesen or Tønnesen is a Norwegian surname that may refer to
Ambrosia Tønnesen (1859-1948), Norwegian sculptor Beatrice Tonnesen (1871–1958), American artist and photographer Carl M. Rynning-Tønnesen (1924–2013), Norwegian police chief Christian Rynning-Tønnesen (born 1959), Norwegian businessman Grethe Tønnesen, Norwegian handball player Kent Robin Tønnesen (born 1991), Norwegian handball player Pau Tonnesen (born 1992), Spanish decathlete Sverre Rynning-Tønnesen (1894–1970), Norwegian electrical engineer and civil servant Terje Tønnesen (born 1955), Norwegian violinist
See also Tønnesen Glacier in Antarctica