William Montgomery (August 3, 1736 – May 1, 1816) was a colonial-American patriot, pioneer, soldier, public servant, and abolitionist.
As a revolutionary patriot, he helped the Province of Pennsylvania declare independence from the British Empire, establish the Commonwealth of Pennsylvania, and save the American Revolution during the Ten Crucial Days.
As a soldier, he served a total of 34 years, including 14 years as major general and division commander.
As a public servant, he was elected or appointed to 16 different offices, including the Continental Congress, Pennsylvania Congress, and United States Congress, and co-authorized the creation of the United States Navy's first six frigates.
As an abolitionist, he helped pass: a resolution to prohibit the future import of slaves into the Province of Pennsylvania in 1775, An Act for the Gradual Abolition of Slavery (the first law adopted by a democracy to end slavery in world history) in 1780, and the Slave Trade Act in 1794.
He was one of seven congressman who voted against the Fugitive Slave Act in 1793.
As a pioneer he founded "Montgomery's Landing", later named Danville, Pennsylvania after his son, Daniel Montgomery.