Oituz
| Oituz | |
|---|---|
| Catholic church in Oituz | |
| Location in Bacău County | |
| Coordinates: 46°12′N 26°37′E / 46.200°N 26.617°E | |
| Country | Romania | 
| County | Bacău | 
| Government | |
| • Mayor (2020–2024) | Claudiu Petrișor (PNL) | 
| Area | 202.23 km2 (78.08 sq mi) | 
| Elevation | 279 m (915 ft) | 
| Population  (2021-12-01) | 8,701 | 
| • Density | 43/km2 (110/sq mi) | 
| Time zone | EET/EEST (UTC+2/+3) | 
| Vehicle reg. | BC | 
| Website | primariaoituz | 
Oituz (formerly Grozești; Hungarian: Gorzafalva) is a commune in Bacău County, Western Moldavia, Romania. It is composed of six villages: Călcâi (Zöldlonka), Ferestrău-Oituz (Fűrészfalva), Hârja (Herzsa), Marginea, Oituz and Poiana Sărată (Sósmező).
Oituz was the site of three battles during the First World War: the First, Second, and the Third Battle of Oituz.
According to Iorgu Iordan, the commune's name is of Turkic origin; otuz or oltuz means "thirty" in some Turkic languages.
Poiana Sărată village is part of Transylvania; in Austria-Hungary, it belonged to Háromszék County, and after a reorganization to Trei Scaune County in Romania until 1950.