Mount William National Park, Nature reserve in northeastern Tasmania, Australia.

Mount William National Park is a 18,439-hectare protected area in northeastern Tasmania, 17 km east of Gladstone. It features long, isolated sandy beaches and low ridges, with Mount William rising to 216 m. The park preserves coastal heathland and dry sclerophyll vegetation, and includes the popular Bay of Fires.

Mount William National Park was established on 3 October 1973, initially covering 8,640 hectares, to protect the threatened Forester kangaroo. It was expanded to 13,806 hectares in 1980 and to 18,439 hectares in 1999. In 2016 the mountain itself, not the park, was officially renamed wukalina / Mount William.

The mountain bears the Aboriginal name Wukalina, and visitors can spot evidence of past Indigenous settlement throughout the park in the form of shell middens and scattered artifacts. These remnants show how people lived in this landscape for generations.

The park has six designated camping areas near Stumpys Bay with basic facilities such as toilets and barbecue spots. Bring your own drinking water since the sites have no water supply, and allow time to explore the coastal paths and sandy shores.

The park was created in 1973 specifically to protect the threatened Forester kangaroo, and that species remains the reason for its founding. Around 100 bird species have been recorded, from the golden whistler-like honeyeaters to the laughing kookaburra, alongside wombats and Tasmanian devils that are hard to see because they are nocturnal.