Cape Mendocino Light, Iron lighthouse in Humboldt County, California, US.

Cape Mendocino Light is a cast-iron lighthouse about 43 feet (13 m) tall, featuring a sixteen-sided tower, a balcony, and a lantern room. The white structure with a red roof now stands in Mal Coombs Park in Shelter Cove, Humboldt County, California.

Built after the SS Northerner and a lighthouse tender were lost near Sugar Loaf and Blunt's Reef, the light entered service on December 1, 1868, flashing white every thirty seconds. The Coast Guard took over in 1939. Volunteers dismantled the 1868 iron tower in 1998, and it was restored and installed at Point Delgada in Shelter Cove's Mal Coombs Park.

The light was first lit on 1 December 1868 and named for Cape Mendocino, the westernmost point of the California coast. Its keepers were serviced by lighthouse tenders because the site was too remote for road access; at least ten served between 1869 and 1926, some raising cows or ponies for the Ferndale-to-Petrolia stagecoach line.

The lighthouse is easy to reach on foot from the parking area at Mal Coombs Park in Shelter Cove. The site is open to the surrounding coast and works well as a short stop during a broader visit to the area.

The first-order Fresnel lens left the tower after World War II, when an automated rotating aerobeacon took over. The Coast Guard loaned it to Ferndale on 24 December 1948; it was displayed in a replica lighthouse at the Humboldt County Fairgrounds entrance until 2012, when the "Save Our Lens" group raised $100,000 to dismantle and store it during remodeling of the Ferndale Museum, where it is now shown.