Elena Armanda Nicolasa Sanz y Martínez de Arizala (1844–1898) was a Spanish opera singer from the 19th century and the mistress of Alfonso XII of Spain.

Elena Sanz was born on 6 December 1844, in Castellón de la Plana (España).

[3] In 1876, she was hired by the Paris Opera for two years, and she played her most important and influential roles there – Maddalena of Rigoletto and Brangäne in Tristan and Isolde.

Castelar described her as a red-lipped, brown-skinned, white-teeth, black hair woman, shining like a star.

She was also featured by Benito Pérez Galdós in his narratives concerning Sanz's relations with the monarch Alfonso XII.