Indre Wijdefjorden National Park (Norwegian: Indre Wijdefjorden nasjonalpark) is located in a steep fjord landscape in northern Spitsbergen in Svalbard, Norway. It covers the inner part of Wijdefjorden—the longest fjord on Svalbard. The national park was established on 9 September 2005 and covers 1,127 km² (435 sq mi), of which 745 km² (288 sq mi) is on land and 382 km² (147 sq mi) is sea.