Masovian Landscape Park (Mazowiecki Park Krajobrazowy) is a protected area (Landscape Park) in east-central Poland, established in 1986, covering an area of 143.7 square kilometres (55.5 sq mi).

[2][3][4] The park was designed on the border of the then voivodeships of Siedlce and the capital of Warsaw.

The scientific foundation was a series of master's theses carried out at the Institute of Environmental Protection at the Warsaw University of Life Sciences under the supervision of prof. Henryk Zimny and doc.

In June 1986, the then Provincial National Council in Siedlce decided to establish a part of the park (approx.

On April 16, 2004, the Masovian Voivode established a 20-year protection plan for the park.