| Kalaus | |
| Pushpin Map: | Russia Stavropol Krai#European Russia |
| Mouth: | Manych |
| Mouth Coordinates: | 45.8489°N 43.3768°W |
| Length: | 436km (271miles) |
| Basin Size: | 9700km2 |
| Progression: | Manych→ |
The Kalaus (Russian: Калаус) is a north-flowing river on the Black Sea-Caspian Steppe of southern Russia, in Stavropol Krai. It is long, and has a drainage basin of .[1] It is a tributary of the Manych. Formerly, when it reached the Manych, part of its waters would flow east and part west. Today a low dam blocks flow into the east Manych.