Pennsylvania smartweed
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Caryophyllales
- family: Polygonaceae
- genus: Persicaria
- species: Persicaria pensylvanica
Langley
British Columbia- Fredericton
- Saint John
New Brunswick- Cambridge
Ontario- Beauharnois
- Berthierville
- Boisbriand
- Charlemagne
- Châteauguay
- Deux-Montagnes
- Farnham
- Lachute
- Lavaltrie
- Longueuil
- Lorraine
- Lévis
- Marieville
- Mont-Royal
- Montréal
- Napierville
- Nicolet
- Oka
- Pincourt
- Princeville
- Québec
- Repentigny
- Rosemère
- Saint-Césaire
- Saint-Damase
- Saint-Jacques
- Saint-Jérôme
- Saint-Lambert-de-Lauzon
- Saint-Laurent
- Saint-Lin-Laurentides
- Sainte-Anne-de-Bellevue
- Sainte-Anne-des-Plaines
- Sainte-Julienne
- Sainte-Sophie
- Sainte-Thérèse
- Sherbrooke
- Terrebonne
- Trois-Rivières
- Varennes
- Westmount
Quebec
Canada
Phoenix
Arizona- Sebastopol
California- Brush
- Colorado Springs
- Columbine
- Evans
- La Salle
Colorado- Bridgeville
Delaware- Five Points
- Lake City
- Watertown
Florida- Algonquin
- Anna
- Athens
- Bloomington
- Blue Island
- Bolingbrook
- Brookfield
- Burr Ridge
- Calumet Park
- Carthage
- Catlin
- Chicago
- Deer Park
- Downers Grove
- East Saint Louis
- Evanston
- Glenview
- Harwood Heights
- Henry
- La Grange
- La Grange Park
- Lake Barrington
- Lyons
- McCullom Lake
- Morton Grove
- North Barrington
- North Peoria
- North Riverside
- Northbrook
- Olney
- Oquawka
- Peoria
- Port Barrington
- Quincy
- River Grove
- Riverside
- Southern View
- Thornton
- Tower Lake
- Urbana
- Wauconda
- Wayne
- West Chicago
Illinois- Chesterton
- Gary
- Hammond
- Noblesville
- Porter
Indiana- Atwood
- Burlington
- Emporia
- Eureka
- Girard
- Hutchinson
- Osborne
Kansas- Orono
Maine- Annapolis
- Berwyn Heights
- Bladensburg
- Brentwood
- Cabin John
- Calverton
- Chesapeake Beach
- Cheverly
- Chevy Chase
- Chevy Chase Village
- College Park
- Colmar Manor
- Cottage City
- East Riverdale
- Easton
- Edmonston
- Fort George G Mead Junction
- Grasonville
- Hurlock
- Hyattsville
- Jessup
- Landover Hills
- Laurel
- Mount Rainier
- Naval Academy
- North Beach
- Owings
- Riva
- Riverdale Park
- Riviera Beach
- Woodlawn
Maryland- Lynn
- Monson
- Monson Center
- Orleans
- Winchester
- Woburn
Massachusetts- Center City
- Cross Lake
- Minneapolis
Minnesota- Starkville
Mississippi- Falls City
- Fremont
- Lincoln
- Seward
Nebraska- Hinsdale
New Hampshire- Carrboro
- Chapel Hill
North Carolina- Sandusky
- Worthington
Ohio- Tonkawa
Oklahoma- McMinnville
Oregon- Bennington
Vermont- Washington, D. C.
Washington, D.C.- Ashwaubenon
- Green Bay
- La Crosse
- Wautoma
Wisconsin
United States