Khanbulanchay reservoir (Azerbaijani: Xanbulançay su anbarı), also known as Khanbulaqchay reservoir (Azerbaijani: Xanbulaqçay su anbarı), is a reservoir in Lankaran Rayon of southeastern Azerbaijan.

[1] The name means "the spring of the khan" in Azerbaijani language.

The reservoir was built on the Bəşəriçay river in 1976.

[2][3] The volume of water in the reservoir is 52 million m³.

The reservoir is used for irrigation purposes in 22 ha (0.22 km2) of land in the subtropical zone through the 7.8 km (4.8 mi) and 8.2 km (5.1 mi) long channels.