815 Area Code

The 815 area code is found in the state of Illinois, and spans 30 different Counties. Listed below are the 30 Counties that reside inside of the 815 area code. Included under the Counties are the cities within the given County.
Boone County Illinois
Belvidere, Caledonia, Capron, Garden Prairie, Poplar Grove
Bureau County Illinois
Arlington, Buda, Bureau, Cherry, Dalzell, Depue, Dover, Kasbeer, La Moille, Ladd, Malden, Manlius, Mineral, New Bedford, Ohio, Princeton, Seatonville, Sheffield, Spring Valley, Tiskilwa, Van Orin, Walnut, Wyanet
Carroll County Illinois
Chadwick, Lanark, Milledgeville, Mount Carroll, Savanna, Shannon, Thomson
Cook County Illinois
Brookfield, Chicago, Glenview, Tinley Park, Western Springs, Wheeling
Dekalb County Illinois
Clare, Cortland, Dekalb, Esmond, Genoa, Hinckley, Kingston, Kirkland, Malta, Sandwich, Shabbona, Somonauk, Sycamore, Waterman
Dupage County Illinois
Oak Brook
Ford County Illinois
Cabery, Kempton, Piper City, Roberts
Grundy County Illinois
Braceville, Coal City, Gardner, Kinsman, Mazon, Minooka, Morris, South Wilmington, Verona
Henry County Illinois
Annawan, Atkinson, Hooppole, Kewanee
Iroquois County Illinois
Ashkum, Beaverville, Buckley, Chebanse, Cissna Park, Claytonville, Clifton, Crescent City, Danforth, Donovan, Gilman, Goodwine, Iroquois, Martinton, Milford, Onarga, Papineau, Sheldon, Stockland, Thawville, Watseka, Wellington, Woodland
Jo Daviess County Illinois
Apple River, East Dubuque, Elizabeth, Galena, Hanover, Nora, Scales Mound, Stockton, Warren
Kane County Illinois
Maple Park
Kankakee County Illinois
Aroma Park, Bonfield, Bourbonnais, Bradley, Buckingham, Essex, Grant Park, Herscher, Hopkins Park, Kankakee, Manteno, Momence, Pembroke Township, Reddick, Saint Anne, Union Hill
Kendall County Illinois
Millington, Newark, Plano, Yorkville
Lake County Illinois
Deerfield, Ingleside
La Salle County Illinois
Cedar Point, Dana, Earlville, Grand Ridge, La Salle, Leland, Leonore, Lostant, Marseilles, Mendota, Oglesby, Ottawa, Peru, Ransom, Rutland, Seneca, Serena, Sheridan, Streator, Tonica, Triumph, Troy Grove, Utica, Wedron
Lee County Illinois
Amboy, Ashton, Compton, Dixon, Eldena, Franklin Grove, Harmon, Lee, Lee Center, Nachusa, Paw Paw, Steward, Sublette, West Brooklyn
Livingston County Illinois
Ancona, Blackstone, Campus, Chatsworth, Cornell, Cullom, Dwight, Emington, Fairbury, Flanagan, Forrest, Graymont, Long Point, Odell, Pontiac, Saunemin, Strawn
Mchenry County Illinois
Alden, Cary, Crystal Lake, Harvard, Hebron, Huntley, Marengo, Mchenry, Richmond, Ringwood, Spring Grove, Union, Wonder Lake, Woodstock
Mclean County Illinois
Chenoa
Marshall County Illinois
Toluca, Wenona
Ogle County Illinois
Baileyville, Byron, Chana, Creston, Davis Junction, Forreston, Holcomb, Leaf River, Lindenwood, Monroe Center, Mount Morris, Oregon, Polo, Rochelle, Stillman Valley, Woosung
Putnam County Illinois
Granville, Hennepin, Magnolia, Mark, Mc Nabb, Putnam, Standard
Stark County Illinois
Bradford
Stephenson County Illinois
Cedarville, Dakota, Davis, Eleroy, Freeport, German Valley, Kent, Lena, Mc Connell, Orangeville, Pearl City, Ridott, Rock City, Winslow
Vermilion County Illinois
Hoopeston
Whiteside County Illinois
Deer Grove, Fenton, Fulton, Galt, Lyndon, Morrison, Prophetstown, Rock Falls, Sterling, Tampico
Will County Illinois
Beecher, Bolingbrook, Braidwood, Channahon, Elwood, Frankfort, Joliet, Lockport, Manhattan, Mokena, New Lenox, Plainfield, Romeoville, Shorewood, Wilmington
Winnebago County Illinois
Cherry Valley, Durand, Loves Park, Machesney Park, Pecatonica, Rockford, Rockton, Roscoe, Seward, Shirland, South Beloit, Winnebago
Woodford County Illinois
Minonk