Eleonora Josephine Selmer (née Nielsen, October 15, 1851 – February 12, 1930)[1] was a Norwegian theater actress.

[2] Leonora Selmer was born in Kragerø, the daughter of the printer Johan Peter Nielsen and Karoline Krøger.

[1] She had her first major role in the fall of 1870 as Alice de Rochegune in Ernest Legouvé's Par droit de conquête (Norwegian title: En Brud ved Erobring).

[5][6] In the summer of 1899 she participated in the Christiania Tour (Norwegian: Christianiaturneen), in which she played the role of Mathilde in Hans Huckebein (Norwegian title: Damen fra Ostende) by Gustav Kadelburg and Oscar Blumenthal.

[7] Leonora Selmer is buried at the Cemetery of Our Saviour in Oslo.