Fort William Lighthouse, Lighthouse and fortification at Dawson's Hill, Cape Coast, Ghana.

Fort William Lighthouse is a fortified structure with a lighthouse tower situated on a hilltop overlooking the Atlantic coast near Cape Coast. The site combines defensive features with navigational functions that helped guide ships along the coastline.

Built in 1820 under British Governor Hope-Smith and first named Smith's Tower, it guided ships into Cape Coast harbour and supported colonial maritime operations. It was reconstructed in the 1830s and renamed Fort William. In 1979 it was inscribed with Ghana's other forts and castles on the UNESCO World Heritage List.

The tower was first called Smith's Tower after Governor Hope-Smith, who oversaw its construction in 1820; it took the name Fort William when rebuilt in the 1830s. It is listed with Ghana's forts and castles as a UNESCO World Heritage site since 1979. Visitors today find the Ghana Museums & Monuments Board offices in the building.

The site is accessible during daylight hours, though visitors should be aware that museum staff occupy the premises. Getting there involves climbing to the hilltop location, so comfortable footwear is advisable for the walk.

The lighthouse stands about 20 metres tall, with its light about 35 metres above sea level and visible roughly 10 nautical miles out. Its square stone tower is painted white and topped by a red lantern roof. The Ghana Museums & Monuments Board keeps offices on the site, and old cannons stand nearby.