Biebrza National Park is a national park in Podlaskie Voivodeship, northeastern Poland, situated along the Biebrza River. The largest of Poland’s 23 National Parks, the Biebrza National Park was created on September 9, 1993. Its total area is 592.23 km, of which forests cover 155.47 km², fields and meadows covering 181.82 km² and marshes with an area of 254.94 km².