Otto/MacDonalds Campsite is a Department of Conservation site located on the northern shore of Lake Mapourika/Māpouriki, within Westland Tai Poutini National Park on New Zealand's West Coast.

It sits just off State Highway 6, roughly 15 kilometres north of Franz Josef/Waiau, with a short gravel access road from the highway. Advance booking is required year-round, and freedom camping on the site is prohibited.

The campground offers 20 non-powered tent sites spread across two areas — Otto and MacDonalds — with facilities including flushing toilets, tap water, picnic tables, and wheelchair access with assistance.

A boat ramp provides direct lake access, and the site is well suited to swimming, trout fishing, and boating. Dogs are not permitted.