Oncești, Bacău

{{Infobox Romanian subdivision

|type = commune

|county = Bacău

|population_total = auto

|name=Oncești

|image_map = Oncesti jud Bacau.png

|map_caption = Location in Bacău County

|coordinates={{coord|46.4790|N|27.2595|E|source:wikidata|display=it}}

}}

Oncești is a commune in Bacău County, Western Moldavia, Romania. It is composed of seven villages: Bărboasa, Dealu Perjului, Oncești, Onceștii Vechi, Satu Nou, Tarnița and Taula.

{{Bacău County}}