Mount Iba is the second-tallest mountain in the Zambales Mountains and the highest point in the province of Tarlac, Philippines. It is located in municipality of San Jose, Tarlac. Water from the mountain drains to the Agno River. With an elevation of 1,605 metres (5,266 ft), between Mount Tapulao (2,037m) and Mount Negron (1,583m).