Berești-Tazlău is a commune located in Bacău County within the Western Moldavia region of Romania. It serves as a rural administrative division characterized by its regional placement in the eastern part of the country.
The commune is composed of seven distinct villages: Berești-Tazlău, Boșoteni, Enăchești, Prisaca, Românești, Tescani, and Turluianu.