Aukštaitija National Park is a national park in northeastern Lithuania, about 100 km north of Vilnius. Established in 1974, it is the oldest of the five national parks in Lithuania. At first it was named Lithuanian SSR National Park to emphasize that it was the first such park in the republic. In 1991, four other parks were established and were renamed after ethnographic regions of Lithuania. The park was renamed after Aukštaitija.