This is a complete list of tributary streams of the Potomac River in the Eastern United States, listed in order from source to mouth. * North Branch Potomac River (Maryland/West Virginia) * South Branch Potomac River (Virginia/West Virginia) * Town Creek (Maryland/Pennsylvania) * Big Run (Maryland) * Little Cacapon River (West Virginia) * Purslane Run (Maryland) * Steer Run (West Virginia) * Fifteenmile Creek (Maryland/Pennsylvania) * Sideling Hill Creek (Maryland/Pennsylvania) * Willett Run (West Virginia) * Cacapon River (West Virginia) * Sir Johns Run (West Virginia) * Warm Spring Run (West Virginia) * Tonoloway Creek (Maryland/Pennsylvania) * Stoney Run (West Virginia) * Ditch Run (West Virginia) * Sleepy Creek (West Virginia) * Licking Creek (Maryland/Pennsylvania)