The province's topography consists of hilly regions in the west (70%) and the fertile plain of Tuy Hòa in the east. Lowlands also extend west along Đà Rằng River. The highest peaks are at 1,592 m on the border of Khánh Hòa Province in the south and at 1,331 m in the northwest (Đồng Xuân District). There are several hills near the coast, including Mô Cheo (Núi Mô Cheo, 814 m) in Sông Cầu and Đá Bia (Núi Đá Bia, 706 m) near Đại Lãnh in Đông Hòa District.