The Boktykaryn (Kazakh: Боқтықарын) is a river in Sozak District, Turkistan Region, Kazakhstan.

[1] The river basin is used for watering livestock grazing in the surrounding area.

[1] The Boktykaryn has its sources in an artesian aquifer area of the western sector of the Betpak Dala.

It heads roughly southwards, about 8 km (5.0 mi) to the east of the Sarysu river.

The Boktykaryn runs parallel to the Sarysu channel for most of its course until in its last stretch it bends southwestwards, and then again southwards shortly before its mouth.