The Belarusian–Polish border is the state border between the Republic of Poland and the Republic of Belarus. It has a total length of 398.6 km (247.7 mi), 418 km (260 mi) or 416 km (258 mi). It starts from the triple junction of the borders with Lithuania in the north and stretches to the triple junction borders with Ukraine to the south. It is also part of the EU border with Belarus. The border runs along the administrative borders of two Voivodships Podlaskie and Lubelskie in the Polish side and Grodno and Brest Vobłasć in the Belarusian side. In the Polish side, the 246.93 km (153.44 mi) section is under the protection of the Podlaski Border Guard Regional Unit, while the 171.31 km (106.45 mi) section is in the operation area of the Bug Border Guard Regional Unit. Border rivers are Czarna Hańcza, Wołkuszanka, Świsłocz, Narew, and Bug.

The Bug or Western Bug is a major river in Eastern Europe that flows through Belarus (border), Poland, and Ukraine, with a total length of 774 kilometres (481 mi). A tributary of the Narew, the Bug forms part of the border between Belarus and Poland for 178 kilometres (111 mi) and part of the border between Ukraine and Poland for 185 kilometres (115 mi).