| Karabash Reservoir | |
| Location: | Tatarstan |
| Coords: | 54.6986°N 52.6661°W |
| Type: | reservoir |
| Pushpin Map: | Russia |
| Basin Countries: | Russia |
| Length: | 8.7km (05.4miles) |
| Area: | 7.31km2 |
| Depth: | 7.2m (23.6feet) |
| Volume: | 52.3e6m3 |
| Cities: | Karabash, Tatarstan |
Karabash Reservoir (Russian: Карабашское водохранилище, Tatar: Карабаш сусаклагычы|translit=Qarabaş susaqlağıçı) is a reservoir of the upper Zay River near Karabash, Tatarstan, Russian Federation. It was filled in 1957 for the local oil and other industry needs. It has surface area 7.31 km², a length 8.7 km, mean depth 7.2 m and a volume 52.3 million cubic meters.