William Clapham (1722 – 28 May, 1763) was an American military officer who participated in the construction of several forts in Pennsylvania during the French and Indian War. He was considered a competent commander in engagements with French troops and Native American warriors, but towards the end of his military career he was unpopular with troops under his command. Following his retirement from the army, he and his family were killed by Lenape warriors on his farm in 1763.