Międzybórz [mʲɛnˈd͡zɨbuʂ], also known as Międzybórz Sycowski (German: Neumittelwalde, until 1886 Medzibor), is a town in Oleśnica County, Lower Silesian Voivodeship, in southern Poland.

It lies approximately 30 kilometres (19 mi) north-east of Oleśnica, and 54 kilometres (34 mi) north-east of the regional capital Wrocław.

The town's name is of Polish origin, meaning "między borami", that is "between forests".

From 1313 it was part of the Duchy of Oleśnica, remaining ruled by the Piast dynasty until 1492.It received town privileges in 1637.

Since the 19th century it has been a centre of the Polish Protestant faith.