Aleida is a female given name. It, like the Dutch name Alida and their variations – Aleid, Aleide, Aleidis, Aleijd, Aleyda, etc. – is derived from the Germanic ('noble person'). The medieval names are often translated to Adelayde or Alice in English.

Aleida and its variations may refer to:

People Medieval Adelaide of Cleves (c.1170–c.1238), also called Aleid, Countess of Holland, wife of Dirk VII Aleidis of Leuven (c. 1103–1151), Brabantian Queen consort of England, wife of Henry I Aleid van Holland, or Aleida van Avesnes (1228–1284), Dutch regent of Holland Aleid van Poelgeest (c.1370–1392), Dutch murdered mistress of the Count of Holland Aleydis van Schaarbeek (1204–1250), Brabantian laysister and mystic

Modern Aleida Assmann (born 1947), German academic Aleida Greve (1670–1742), Dutch painter Aleida Guevara (born 1960), Cuban physician and Marxist, Che Guevara's daughter Aleida Leurink (1682–1755), Dutch writer Aleida March (born 1937), Che Guevara's Cuban second wife Aleida Núñez (born 1981), Mexican actress, singer and model Aleyda Ortiz (born 1980), Puerto Rican actress and beauty pageant Aleida Mathilda van Keulen (1920–2010), Dutch Resistance member Aleida Quintana (born 1987), Mexican human rights activist Aleida Alavez Ruiz (born 1974), Mexican politician Aleida Wolfsen (1648–1692), Dutch portrait and historical painter

Fictional characters Aleida Diaz, a character in the Netflix television series, Orange Is the New Black Aleida Rosales, a character in the Apple TV+ series, For All Mankind