| Ak-Suu | |
| Mouth Coordinates: | 40.1933°N 69.3424°W |
| Subdivision Type1: | Country |
| Length: | 93km (58miles) |
| Discharge1 Avg: | 3.81m3/s |
| Basin Size: | 1170km2 |
| Tributaries Left: | Tenisbai, Kel, Djakurut, Berk-Suu, Gudunduk |
The Ak-Suu or Yokhsu/Oqsu (Kirghiz; Kyrgyz: Ак-Суу,) is a left tributary of the Syr Darya, flowing through Batken Region of Kyrgyzstan and Sughd Region of Tajikistan. The river starts at Ay-Kul, in the north slopes of Turkestan Range in Sarkent State Nature Park.[1] It flows into the river Syr Darya near the town Navkat in northern Tajikistan. The main settlements at the river are the village Ak-Suu in Kyrgyzstan and the town Navkat in Tajikistan.
It is long, and has a drainage basin of . Its average flow rate is 3.81m3/s.[2] [3]