García Ordóñez (died 29 May 1108), called de Nájera or de Cabra and in the epic literature Crispus or el Crespo de Grañón, was a Castilian magnate who ruled the Rioja, with his seat at Nájera, from 1080 until his death. He is famous in literature as the rival of Rodrigo Díaz de Vivar, the Cid, whose high position at court he took over after the Cid's exile in 1080. He was one of the most important military leaders and territorial governors under Alfonso VI, and was entrusted with military tutorship of the king's heir, Sancho Alfónsez, with whom he died on the field of battle at Uclés.
García was the son of a count Ordoño Ordóñez whose identity is disputed. An Ordoño Ordóñez, grandson of kings Ramiro III and Bermudo II of León, has been suggested as being this count, but his geographical base was in León, whereas García's was in Castile. Further, there is debate as to whether this Leonese Ordoño Ordóñez even existed. More recently it has been suggested that the Castilian count Ordoño Ordóñez, García's father, was son of count Ordoño Fafílaz of the Banu Gómez clan. García's father can be shown from surviving documents to have served as alférez to Ferdinand I of León and Castile between 19 April 1042 and 1 July 1047. García's mother was named Enderquina, but her origins are unknown. He was also related, somehow, to Álvaro Díaz de Oca.
Sometime before 1081 García married the infanta Urraca Garcés, a daughter of García Sánchez III of Navarre and sister of Sancho Garcés IV. The earliest reference to the marriage dates from 18 April that year, when the couple witnessed a donation of her brother Ramiro Garcés. Urraca gave García three children, two daughters (Elvira and Mayor) and a son Fernando, speculated to be identical to Fernando García de Hita, progenitor of the House of Castro. A charter issued by Mayor in 1145 traces her royal ancestry.