Francisco Xavier Martínez Marina (10 May 1754–25 July 1833) [1] was a noted Spanish jurist, historian and priest.

[2] Born in Oviedo, capital city of the Principality of Asturias in northern Spain, he was director of the Real Academia de la Historia, an institution dedicated to the study of Spain's political, civilian, ecclesiastical and military history.

He also was a member of the Real Academia Española, the institution responsible for regulating the Spanish language.

Marina also wrote diverse works on the history of Spanish law, including Ensayo histórico-crítico sobre la legislación y principales cuerpos legales de los reinos de León y Castilla especialmente sobre el código de las Siete Partidas de D. Alonso el Sabio (a study of the Siete Partidas, Spain's seven-part legal code that was followed for centuries both there and in Latin America), and a work entitled Juicio crítico de la Novísima Recopilación (Analysis of the Latest Compilation).

Marina died in 1833, a resident of Zaragoza, the capital city of the autonomous region and former kingdom of Aragon in Spain.