Fuji-Hakone-Izu National Park (富士箱根伊豆国立公園 Fuji-Hakone-Izu Kokuritsu Kōen) is a national park in Yamanashi, Shizuoka, and Kanagawa Prefectures, and western Tokyo Metropolis, Japan. It consists of Mount Fuji, Fuji Five Lakes, Hakone, the Izu Peninsula, and the Izu Islands. Fuji-Hakone-Izu National Park covers 1,227 square kilometres (474 sq mi).

Rather than being a specific spot, the park is a collection of dispersed tourist sites that dot the region. The farthest point south, the isle of Hachijō-jima, is several hundred kilometers from Mount Fuji. The park includes a variety of geographic features including natural hot springs, coastlines, mountainous areas, lakes, and more than 1000 volcanic islands. Vegetation in the park ranges from species of mountainous trees to the subtropical vegetation of the Izu Islands.

Fuji-Hakone-Izu National Park was established on February 2, 1936 as Fuji-Hakone National Park, and is one of the first four national parks established in Japan. In 1950, the Izu islands were added to the park, and its name changed to its present designation. Due to its proximity to the Tokyo metropolis and ease of transportation, it is the most visited national park in all Japan.