The Gukhak (Korean: 국학; Hanja: 國學) was the sole recorded institution of higher learning in the Silla period of medieval Korean history.
The Gukhak was established early in the Unified Silla period, in 682 (the second year of King Sinmun).
Like its counterpart in Tang China, the Gukhak was established primarily to train local officials in the Confucian classics and the composition skills requisite for the governance of an enlarged Silla state.
The establishment of such an institution was increasingly critical by the 7th century with the maturation of Silla's bureaucratic system modeled upon that of Tang China.
The Gukhak was superseded by the Gukjagam, which was established in Gaegyeong in 992 during the Goryeo dynasty.