Casper Shafer (c. 1712— 17 December 1784) was among the first settlers of the village of Stillwater along the Paulins Kill in Sussex County, New Jersey in the United States. A successful miller and early tavern owner, Shafer later served in the first sessions of the New Jersey Legislature during the American Revolution. During these sessions, New Jersey had become a newly independent state, established the first state constitution, ordered the state's last Royal Governor deposed and arrested, and actively supported and financed the Continental Army.