Ada River may refer to the following watercourses:
In Australia Ada River (Baw Baw, Victoria), a watercourse in the Shire of Baw Baw of Victoria Ada River (East Gippsland, Victoria), a tributary of the Bemm River in the Shire of East Gippsland of Victoria
In Italy Adda (river), or Ada, a tributary of the Po in North Italy
In New Zealand Ada River (New Zealand), a tributary of the Waiau River in the South Island
See also Ada (disambiguation) Adda River (disambiguation)