Bialystok District was an administrative unit of Nazi Germany created during the World War II invasion of the Soviet Union. It was to the south-east of East Prussia, in present-day northeastern Poland as well as in smaller sections of adjacent present-day Belarus and Lithuania. It was sometimes also referred to by the designation South East Prussia along with the Regierungsbezirk Zichenau, although in contrast to the latter, it was not incorporated into, but merely attached to East Prussia.

Grodno or Hrodna is a city in western Belarus. It is one of the oldest cities of Belarus. The city is located on the Neman River, 300 kilometres (190 mi) from Minsk, about 15 kilometres (9.3 mi) from the border with Poland, and 30 kilometres (19 mi) from the border with Lithuania. Grodno serves as the administrative center of Grodno Region and Grodno District, though it is administratively separated from the district. As of 2024, the city has a population of 361,115 inhabitants.