The Battle of Cooch's Bridge, also known as the Battle of Iron Hill, is a battle fought on September 3, 1777, between the Continental Army and American militia and primarily German soldiers serving alongside the British Army during the American Revolutionary War.

It is the only significant military action during the war on the soil of Delaware (though there are also naval engagements off the state's coast), and it takes place about a week before the major Battle of Brandywine.

Reportedly, the battle sees the first flying of the U.S. flag.

After landing in Maryland on August 25 as part of a campaign to capture Philadelphia, the seat of the Continental Congress, British and German forces under the overall command of General William Howe begin to move north.

Their advance is monitored by a light infantry corps of Continental Army and militia forces that had based itself at Cooch's Bridge, near Newark, Delaware.

On September 3, German troops leading the British advance are met by musket fire from the U.S. light infantry in the woods on either side of the road leading toward Cooch's Bridge.

Calling up reinforcements, they flush the Americans out and drive them across the bridge.