Brzeg Dolny is a town in Wołów County, Lower Silesian Voivodeship in south-western Poland. It is located 31 km (19 mi) north-west of Wrocław on the Oder River, and is the site of a large chemical plant complex, PCC Rokita SA. As of December 2021, the town has a population of 12,395. It is part of the Wrocław metropolitan area.

Lower Silesian Voivodeship in southwestern Poland, is one of the 16 voivodeships (provinces) into which Poland is divided. The voivodeship was created on 1 January 1999 out of the former Wrocław, Legnica, Wałbrzych and Jelenia Góra Voivodeships, following the Polish local government reforms adopted in 1998. It covers an area of 19,946 square kilometres (7,701 sq mi), and as of 2019 has a total population of 2,899,986.