The Sanuki Mountains (讃岐山脈, Sanuki-sanmyaku) are a mountain range running along the southern border of Kagawa and the northern border of Tokushima prefectures on the island of Shikoku, Japan.

The highest peak is Mt. Ryūō (竜王山, Ryūō-zan) at 1059.9 m.^[1]

Parts of the mountains are included within the Ōtaki-Ōkawa Prefectural Natural Park.