Mount Lewis National Park, Nature reserve in Douglas Shire, Australia.

Mount Lewis National Park is a nature reserve located in the Wet Tropics region of Queensland, featuring rainforest and mountainous terrain. The landscape consists of steep slopes covered in dense vegetation that creates a wild and remote character.

The reserve was established in 2009 by combining two earlier forest reserves into a single protected area. This merger created a larger conservation zone designed to safeguard the tropical ecosystems of the region.

Mount Lewis National Park lies within the traditional territory of the Kuku Yalanji Aboriginal people of Far North Queensland. The park's name comes from the mountain it protects, and the surrounding Wet Tropics region has been home to Aboriginal communities for thousands of years. Visitors travelling Mount Lewis Road pass through this country, which remains connected to Kuku Yalanji culture today.

The reserve can be reached via Mount Lewis Road from the Mount Molloy area, and visitors should be prepared for unpaved access routes and wet weather. There are no lodging or camping facilities within the reserve itself.

In February 2017 a small population of the endangered northern bettong was found in the park, far from its other known sites. The park also holds the Mount Lewis spiny crayfish, found nowhere else, and giant blue earthworms. Birders watch clearings along Mount Lewis Road for golden bowerbirds and blue-faced parrotfinches.