Ostróda County is a unit of territorial administration and local government (powiat) in Warmian-Masurian Voivodeship, northern Poland. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and largest town is Ostróda, which lies 37 kilometres (23 mi) west of the regional capital Olsztyn. The county contains three other towns: Morąg, 25 km (16 mi) north of Ostróda, Miłakowo, 34 km (21 mi) north of Ostróda, and Miłomłyn, 12 km (7 mi) north-west of Ostróda.

Warmian–Masurian Voivodeship is a voivodeship (province) in northeastern Poland. Its capital and largest city is Olsztyn. The voivodeship has an area of 24,192 km2 (9,341 sq mi) and in 2019 had a population of 1,425,967.