George Washington's crossing of the Delaware River, which occurred on the night of December 25–26, 1776 during the American Revolutionary War, was the first move in a complex and surprise military maneuver and attack organized by George Washington which culminated in their attack on Hessian forces garrisoned at Trenton.

Washington and his troops successfully attacked the Hessian forces in the Battle of Trenton on the morning of December 26, 1776. The military campaign was organized in great secrecy by Washington, who led a column of Continental Army troops from today's Bucks County, Pennsylvania across the icy Delaware River to today's Mercer County, New Jersey in what was one of the Revolutionary War's most logistically challenging and dangerous clandestine operations.

Washington's army then crossed the Delaware River a third time at the end of 1776 under difficult circumstances by the uncertain thickness of the ice on the river. They defeated British reinforcements under Lord Cornwallis at Trenton on January 2, 1777, and were also triumphant over his rear guard at Princeton the following day prior to retreating to his winter quarters in Morristown, New Jersey.