McKellar Campsite is a DOC-managed camping area located beside McKellar Hut on the Greenstone and Caples tracks in New Zealand's South Island.

Situated roughly at the halfway point of the Greenstone–Caples loop, it sits within the beech forest landscape of the Greenstone River valley. Bookings are required year-round.

Campers are welcome to use the water supply and toilet facilities at the adjacent McKellar Hut. Note that camping is not permitted on McKellar Saddle due to the fragile subalpine environment, nor on the privately owned valley floors nearby.