| Kigach | |
| Source1: | Akhtuba |
| Source1 Coordinates: | 46.6078°N 48.2608°W |
| Mouth: | Shirokaya |
| Mouth Coordinates: | 46.4719°N 48.8208°W |
| Progression: | Shirokaya→ Caspian Sea |
| Subdivision Type1: | Country |
| Subdivision Name1: | Kazakhstan |
| Length: | 378km (235miles) |
| Basin Size: | 14900km2 |
The Kigach (Russian: Кигач, Kazakh: Қиғаш, Qiğaş) is a river of southern Russia (Astrakhan Oblast) and Kazakhstan (Atyrau Region). A left distributary of the Akhtuba, it is part of the Volga Delta.