بوتوماك هوا نهر فى ڤيرچينيا الغربيه.
نهر بوتوماك طولو 590 كيلومتر, حوض النهر بيغطى مساحه 38100 كيلومتر مربع, القدره التفريغيه ليه 306 متر مكعب/ثانيه و بيرفده Anacostia River و Antietam Creek و Shenandoah River و Monocacy River و Rock Creek و Accotink Creek و Aquia Creek و Broad Run و Cacapon River و Catoctin Creek و Chopawamsic Creek و Coan River و Conococheague Creek و Difficult Run و Dogue Creek و Donaldson Run و Foundry Branch و Four Mile Run و Goose Creek و Hull Creek و Licking Creek و Little Hunting Creek و Little River و Maddox Branch و Mattawoman Creek و Muddy Branch و Neabsco Creek و Piney Run و Piscataway Creek و Pohick Creek و Pomonkey Creek و Popes Creek و Potomac Creek و Quantico Creek و Savage River و Seneca Creek و Sleepy Creek و Spout Run و St. Marys River و Watts Branch و Wicomico River و Windy Run و Yeocomico River و Occoquan River و North Branch Potomac River و Opequon Creek و Hunting Creek و Mattox Creek و Laurel Fork, بيصب فى خليج تشيزبيك