|Aqtay, Aktay River|
|Main source||Verkhnie Mataki, Alkeyevsky District|
|River mouth||Izmeri, Spassky District
53 m (174 ft)
|Basin size||1,016 km2 (392 sq mi)|
|Length||89 km (55 mi)|
The Aktay (Russian: Актай) or Aqtay (Tatar: Cyrillic Актай, Latin Aqtay) is a river in Tatarstan, Russian Federation, a left-bank tributary of the Volga River, falling into the Kuybyshev Reservoir near Izmeri. It is 89 kilometres (55 mi) long, and its drainage basin covers 1,016 square kilometres (392 sq mi).
The major tributaries are Chelninka, Salmanka, and Romodanka. The maximal mineralization is 500 to 700 mg/l. The average sediment deposition at the river mouth each year is 71 millimetres (2.8 in). Drainage is regulated. In the upper stream use to dry. Bazarnye Mataki is along the river.