Phnom Bok () is a hill in the northeast of Eastern Baray in Cambodia, with a prasat (temple) () of the same name built on it. It is one of the trilogies of mountains, each of which has a temple with similar layout. The creation of the temple is credited to the reign of Yasovarman I (889-910): between 9th and 10th centuries; established after he moved his capital to Angkor and named it Yasodharapura. The two other sister temples, named after the contiguous hills, are the Phnom Bakheng and Phnom Krom.: