Diamond Lake Campsite is a DOC-managed site on the shores of Diamond Lake, near Glenorchy in the Otago region, sitting on the edge of Mt Aspiring National Park.

The lake itself lies beneath the eastern flanks of Mt Alfred, roughly 17 kilometres north of Glenorchy, and access involves driving an unsealed road. Bookings are required. The campsite is suitable for campervans and caravans only.

Facilities are basic, and open fires are not permitted at any time. Dogs are not allowed.

The lake offers swimming, fishing, and kayaking, and the surrounding area is part of the Diamond Lake Wildlife Management Reserve, established in 1981 for its wildlife and fisheries values.