Liesjärvi National Park is a national park in the Tavastia Proper region of Finland. Its area is 22 km2. In 1920, part of the present-day national park area was already defined as protected area. The relatively small park area has over 40 km of shoreline. As a whole, the national park is a slice of the near-natural state lake highlands of Häme. It includes the Korteniemi traditional estate, where visitors can try their skills in traditional agricultural work. There are camping places for travel trailers and tents.