The Ozanne is a 44 km long French river, a tributary of the Loir, a tributary of the Loire.
The river spring is located at Perche-Gouët, Béthonvilliers at 222 m high at le Burail locality in le Bois de Beaumont.
2 offshoots: la Suzanne ou Sainte-Suzanne et l'Ozanne de Dampierre ou Moranne ou Mozanne which join near Brou.
It flows into le Loir, right bank, 1 km north of Bonneval at 129 m high at Ouzenain (locality).
The Ozanne has 7 official affluents (14 including sub-affluents) :