Cape Northumberland

Cape Northumberland is a rugged coastal headland near Port MacDonnell in the District Council of Grant, South Australia, marking the southernmost point of the state's mainland. Notable for its dramatic limestone cliffs, windswept coastline and historic lighthouse site, it overlooks the Southern Ocean. Named in 1800 by explorer James Grant, the cape offers scenic coastal views, significant maritime heritage and natural coastal landscapes within the Limestone Coast region.

Visitors can expect an exposed, windswept headland with dramatic limestone cliffs dropping to the Southern Ocean, open grassy terrain and coastal heath. The site features the historic Cape Northumberland Lighthouse and former lighthouse ruins, viewing areas overlooking the ocean and coastline, and interpretive signage. The surroundings are natural and largely undeveloped, with strong winds, sea views, and opportunities for coastal walking, photography and observing seabirds and marine conditions.