All Marathon Gas Locations - Illinois
- Addison
- Altamont
- Antioch
- Arcola
- Arlington Heights
- Arthur
- Aurora
- Barrington
- Bartlett
- Batavia
- Beach Park
- Bellwood
- Belvidere
- Bensenville
- Benton
- Berwyn
- Bloomingdale
- Bloomington
- Bolingbrook
- Braidwood
- Bridgeview
- Broadview
- Brookfield
- Burnt Prairie
- Calumet Park
- Capron
- Carbondale
- Cary
- Casey
- Centralia
- Champaign
- Charleston
- Chicago
- Chicago Heights
- Cicero
- Clinton
- Countryside
- Cowden
- Crestwood
- Crete
- Crystal Lake
- Danville
- Decatur
- Deerfield
- Dekalb
- Des Plaines
- Dieterich
- Dixon
- Dolton
- Downers Grove
- Du Quoin
- Dwight
- East Dundee
- Edgewood
- Effingham
- Elgin
- Elk Grove Village
- Elmhurst
- Elmwood Park
- Evanston
- Evergreen Park
- Fairfield
- Flora
- Fox Lake
- Franklin Park
- Geneva
- Genoa
- Gilman
- Glendale Heights
- Glenview
- Grayslake
- Greenup
- Hampshire
- Hanover Park
- Harvard
- Harvey
- Hickory Hills
- Hillside
- Hinsdale
- Hoffman Estates
- Homer
- Homewood
- Ina
- Ingleside
- Joliet
- Justice
- Kankakee
- Kirkland
- Lake Bluff
- Lake Villa
- Lake Zurich
- Lansing
- Lawrenceville
- Libertyville
- Lincolnshire
- Lincolnwood
- Lisle
- Lockport
- Lombard
- Long Grove
- Loves Park
- Machesney Park
- Mahomet
- Malta
- Marengo
- Marion
- Markham
- Marshall
- Mattoon
- Maywood
- Mccook
- Mchenry
- Mcleansboro
- Melrose Park
- Mendota
- Minooka
- Monroe Center
- Montgomery
- Montrose
- Morris
- Morton
- Morton Grove
- Mossville
- Mount Carmel
- Mount Prospect
- Mount Vernon
- Mount Zion
- Moweaqua
- Mundelein
- Murphysboro
- Naperville
- Neoga
- Newton
- Niles
- Normal
- North Chicago
- Northbrook
- Northlake
- Oak Forest
- Oak Lawn
- Ohio
- Olney
- Ottawa
- Palatine
- Pana
- Paris
- Park Forest
- Park Ridge
- Paxton
- Pekin
- Peoria
- Peru
- Plano
- Pocahontas
- Pontiac
- Poplar Grove
- Posen
- Prospect Heights
- Richmond
- Ridge Farm
- River Grove
- Riverside
- Robinson
- Rockford
- Rolling Meadows
- Roselle
- Round Lake
- Round Lake Beach
- Round Lake Heights
- Salem
- Sandwich
- Sauk Village
- Saunemin
- Schaumburg
- Schiller Park
- Seneca
- Shelbyville
- Skokie
- South Elgin
- South Holland
- Springfield
- St Elmo
- Steger
- Stickney
- Stillman Valley
- Stone Park
- Strasburg
- Streator
- Sullivan
- Sycamore
- Taylorville
- Teutopolis
- Third Lake
- Tilton
- Tuscola
- Urbana
- Vandalia
- Villa Park
- Waukegan
- Wayne City
- West Chicago
- West Frankfort
- Westmont
- Wheaton
- Wheeling
- Wilmette
- Winfield
- Winthrop Harbor
- Wonder Lake
- Wood Dale
- Woodridge
- Woodstock
- Worth
- Zion