Illinois pondweed
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Alismatales
- family: Potamogetonaceae
- genus: Potamogeton
- species: Potamogeton illinoensis
Belmopan
Cayo
BelizeCharlemagne
Lavaltrie
Longueuil
Quebec
CanadaSan José
Petén
GuatemalaBenito Juarez
Mexico CityAnenecuilco
Ciudad Ayala
Morelos
MexicoSpanish Fort
AlabamaParagould
ArkansasEustis
Leesburg
McGregor
Whiskey Creek
FloridaOquawka
IllinoisColumbia City
Culver
Fowler
Gary
Shorewood Forest
IndianaClear Lake
IowaHavre de Grace
Perryville
MarylandAmherst Center
Cambridge
Somerville
MassachusettsLe Center
MinnesotaBuffalo
Green Island
Herkimer
Mohawk
Troy
Watervliet
New YorkKlamath Falls
OregonHemlock Farms
PennsylvaniaBrushy Creek
TexasMead
WashingtonWashington, D. C.
Washington, D.C.Green Bay
Oconomowoc
Wisconsin
United States