Mercader is a Catalan family name. It may refer to:
Caridad Mercader (1892–1975), Spanish communist militant and Soviet agent Maria Mercader (1965–2020), American journalist and news producer María Mercader (1918–2011), Spanish film actress and wife of film director Vittorio De Sica Ramón Mercader (1913–1978), Spanish Communist, known for assassinating Leon Trotsky Saülo Mercader (born 1944), Spanish artist