Chopawamsic Creek is a tributary stream of the Potomac River in Prince William and Stafford counties, Virginia. Chopawamsic Creek is formed by the confluence of the North and South Branches Chopawamsic Creek and empties into the Potomac River south of Quantico at the Marine Corps Base Quantico's Air Station. Breckenridge Reservoir lies at the stream's confluence with the North and South Branches. Along with its North Branch, Chopawamsic Creek forms part of the boundary between Prince William and Stafford counties.
The Board on Geographic Names decided upon Chopawamsic Creek as the stream's official name in 1891. Previously, it had been known by the following names according to the Geographic Names Information System:
Tributary streams are listed from source to mouth.