Sancho IV Garcés ( 1038 – 4 June 1076), called Sancho of Peñalén () or Sancho the Noble, was King of Navarre from 1054 to 1076. He was the eldest son and heir of García Sánchez III and Estefanía. At the age of fourteen Sancho was proclaimed king in the camp by the field where his father was killed at the Battle of Atapuerca. Sancho's mother served as his regent, remaining faithful to her husband's wishes, she continued the support of the monastery he founded at Nájera, where several Navarrese monarchs are interred.