| Oituz | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Covasna, Bacău |
| Length: | 62km (39miles) |
| Source1: | Brețcu Mountains |
| Mouth: | Trotuș |
| Mouth Location: | Onești |
| Mouth Coordinates: | 46.2534°N 26.7571°W |
| Basin Size: | 337km2 |
| Tributaries Left: | Caraslău, Ghergheanoș, Brezoaia |
| Tributaries Right: | Lupchianu, Haloș, Leșunțul Mare, Manciuc |
The Oituz (Hungarian: Ojtoz) is a right tributary of the river Trotuș in Romania.[1] It discharges into the Trotuș in Onești.[2] The following towns and villages are situated along the river Oituz, from source to mouth: Oituz (CV), Poiana Sărată, Oituz (BC), Bogdănești and Onești. Its length is 62km (39miles) and its basin size is 337km2.