Carsten Niebuhr or Karsten Niebuhr (17 March 1733 Lüdingworth – 26 April 1815 Meldorf, Dithmarschen), a German mathematician, cartographer, and explorer in the service of Denmark, is renowned for his participation in the Royal Danish Arabia Expedition (1761-1767). He was the father of the Danish-German statesman and historian Barthold Georg Niebuhr, who published an account of his father's life in 1817.