773 Area CodeThe 773 area code is found in the state of Illinois, and spans 4 different Counties. Listed below are the 4 Counties that reside inside of the 773 area code. Included under the Counties are the cities within the given County.
Cook County Illinois
Arlington Heights, Berwyn, Broadview, Chicago, Chicago Heights, Cicero, Country Club Hills, Des Plaines, Elk Grove Village, Elmwood Park, Evergreen Park, Franklin Park, Harwood Heights, La Grange, Lincolnwood, Lyons, Maywood, Mount Prospect, Niles, Oak Park, Palos Hills, Riverdale, Riverside, Schaumburg, Schiller Park, Skokie, Tinley Park
Dupage County Illinois
Downers Grove, Elmhurst, Lombard, Wood Dale
Lake County Illinois
Libertyville, Round Lake
Stephenson County Illinois