Wigry National Park (Polish: Wigierski Park Narodowy) is a National Park in Podlaskie Voivodeship in north-eastern Poland. It covers parts of the Masurian Lake District and Augustów Primeval Forest (Puszcza Augustowska). It is named after lake Wigry, the largest of the Park's many lakes. It is also classed as a Ramsar wetland site, one of 13 such sites in Poland.
The Park was created on January 1, 1989, on an area of 149.56 km². Today it is slightly larger at 150.86 km2 (58.25 sq mi), of which 94.64 km² is forest, 29.08 km² is waters and 27.14 km² other types of land, mostly agricultural. Strictly protected zones account for 6.23 km², including 2.83 km² of woods. The Park has its headquarters in the town of Suwałki.