Royal Manas National Park, National park in southern Bhutan.

Royal Manas National Park is a protected area in southern Bhutan covering around 1,000 square kilometers, featuring subtropical forests, grasslands, and alpine zones across different elevations. The landscape shifts from dense woodlands in lower areas to more open terrain at higher altitudes.

Royal Manas is Bhutan's oldest national park. In the early 1990s it was one of the first focuses of the Bhutan Trust Fund, which funded infrastructure and baseline biological and socio-economic surveys. Bhutan's first park management plan was drawn up for Royal Manas and guided the management of the country's other parks.

About 5,000 people live in remote, isolated villages inside the park, and the park yields plants used in food, commerce, medicine and religious rituals. Entry is prohibited to the public, so these uses are not something a visitor can watch; the painted tiger on the stone pillar at the entrance is the closest most travellers get to the park's wildlife.

Entry to Royal Manas National Park is prohibited to the public, so there are no guided walks, birdwatching tours or camping inside its boundaries. The park is a restricted conservation area managed under Bhutan's Department of Forest, and its 1,057 square kilometres are not open to visitors.

Royal Manas is the only Bhutanese park inhabited by the one-horned rhinoceros and by wild water buffalo. Its rivers also hold three rare migratory mahseer fish: the deep-bodied mahseer, the golden mahseer and the chocolate mahseer, known locally as katle.