Onești (Romanian pronunciation: [oˈneʃtʲ]; Hungarian: Ónfalva), formerly known as Gheorghe Gheorghiu-Dej,[3] is a city in Bacău County, Romania, with a population of 34,005 inhabitants as of 2021.

Above the borough Malu, on the right-hand side of the river Cașin, were discovered archaeological fragments from a settlement dating from the Neolithic.

Onești is located in the Tazlău-Cașin Depression of the Eastern Carpathians at an average altitude of 210 metres (690 ft).

[5] It lies at the confluence of the rivers Trotuș, Cașin, Oituz, and Tazlău, some 60 km (37 mi) southwest of the county capital, Bacău.

[citation needed] Popular tourist attractions are Perchiu Hill and the Hero Cross from atop the aforementioned hill, the Municipal History Museum, a steel monument dedicated to the Romanian national poet Mihai Eminescu, and the city park.