Kampinos National Park (Polish: Kampinoski Park Narodowy) is a National Park in east-central Poland
, in Masovian Voivodeship, on the north-west outskirts of Warsaw
. It has a sister park agreement with Indiana Dunes National Lakeshore, Indiana, United States
. The idea of creating a park here appeared for the first time in the 1920s. In the 1930s the first forest reserves were opened: Granica, Sieraków and Zamczysko
. Today, these reserves are much larger and are strictly protected.