David Williamson (1752–1814) was a Colonel in the Pennsylvania militia during the American Revolutionary War. He was born near Carlisle, Pennsylvania. He led the expedition that murdered 100 Moravian Delaware Indians at the town of Gnadenhutten, Ohio. It became known as the Gnadenhutten massacre. He was also second in command of the Crawford expedition which was defeated by the combined Native American and British force at the Battle of Sandusky on June 4–6, 1782 near the Wyandot village of Upper Sandusky, Ohio. He led the majority of the remaining force home and was in command during the subsequent Battle of Olentangy during the retreat home on June 6, 1782. Following the war, Williamson was elected to several terms as Sheriff of Washington County, Pennsylvania; however, his attempts at various business ventures failed and he died in poverty in 1814.