Archipelago National Park, Kimito Island

Archipelago National Park (Swedish: Skärgårdshavets nationalpark, Finnish: Saaristomeren kansallispuisto) is a national park in Southwest Finland. It was established in 1983 and includes 500 km2 (190 sq mi) of land area. Most of the land is on islands smaller than 1 km2 (0.39 sq mi). The park encompasses about 2,000 of the 8,400 islets and skerries within the cooperative area. The larger islands are mainly owned by their inhabitants. Archipelago National Park is part of the UNESCO biosphere reserves and received a PAN Parks certificate in 2007.

The park encompasses most of the Archipelago Sea region east of Åland and south of the main islands of Korpo, Nagu, Pargas, and Kimitoön. The park is mainly situated in the (former) municipalities of Nagu, Korpo, Houtskär, Iniö, Hitis, and southern Pargas. The Archipelago Sea Biosphere reserve consists of the national park's cooperative area and the rest of the islands in the Åboland archipelago only accessible by boat or ferry.

One of the objectives of the national park is to protect the archipelago's cultural landscape—such as the considerable areas used for traditional agriculture—in addition to the natural landscape. To this end, the cooperative area is an essential extension of the national park.