- Abingdon, Illinois, IL — 84 chapters
- Aledo, Illinois, IL — 134 chapters
- Alsip, IL — 32 chapters
- Alton, Illinois, IL — 169 chapters
- Amboy, IL — 23 chapters
- Annawan, Illinois, IL — 75 chapters
- Antioch, Illinois, IL — 115 chapters
- Argenta, Illinois, IL — 65 chapters
- Arlington Heights, IL — 29 chapters
- Aroma Park, IL — 20 chapters
- Ashland, IL — 22 chapters
- Ashton, IL — 22 chapters
- Athens, Illinois, IL — 54 chapters
- Atlanta, Illinois, IL — 82 chapters
- Atwood, Illinois, IL — 48 chapters
- Auburn, IL — 39 chapters
- Bannockburn, IL — 25 chapters
- Barrington, IL — 11 chapters
- Barrington Hills, Illinois, IL — 77 chapters
- Barry, Illinois, IL — 73 chapters
- Bartlett, Illinois, IL — 197 chapters
- Bartonville, IL — 39 chapters
- Batavia, Illinois, IL — 133 chapters
- Beach Park, Illinois, IL — 116 chapters
- Beardstown, IL — 23 chapters
- Bedford Park, Illinois, IL — 158 chapters
- Beecher, Illinois, IL — 140 chapters
- Belleville, Illinois, IL — 72 chapters
- Bellevue, IL — 42 chapters
- Bellflower, IL — 1 chapters
- Bellwood, Illinois, IL — 108 chapters
- Belvidere, IL — 68 chapters
- Bement, IL — 46 chapters
- Bensenville, Illinois, IL — 149 chapters
- Berkeley, Illinois, IL — 149 chapters
- Berwyn, Illinois, IL — 244 chapters
- Bloomingdale, Illinois, IL — 112 chapters
- Bloomington, IL — 49 chapters
- Blue Island, Illinois, IL — 84 chapters
- Bolingbrook, IL — 28 chapters
- Boone County, IL — 29 chapters
- Bourbonnais, IL — 36 chapters
- Bowen, Illinois, IL — 4 chapters
- Bradley, IL — 0 chapters
- Breese, IL — 25 chapters
- Brighton, Illinois, IL — 55 chapters
- Broadview, Illinois, IL — 161 chapters
- Broadwell, Illinois, IL — 2 chapters
- Brookfield, IL — 63 chapters
- Brookport, IL — 37 chapters
- Brownstown, IL — 24 chapters
- Buckingham, Illinois, IL — 61 chapters
- Buffalo Grove, IL — 19 chapters
- Burbank, IL — 18 chapters
- Burnham, IL — 0 chapters
- Calumet, IL — 29 chapters
- Calumet Park, Illinois, IL — 64 chapters
- Campton Hills, Illinois, IL — 80 chapters
- Canton, Illinois, IL — 181 chapters
- Carbon Hill, IL — 37 chapters
- Carbondale, Illinois, IL — 192 chapters
- Carlyle, IL — 27 chapters
- Carmi, Illinois, IL — 56 chapters
- Carol Stream, Illinois, IL — 19 chapters
- Carpentersville, IL — 17 chapters
- Carrollton, Illinois, IL — 67 chapters
- Carthage, Illinois, IL — 115 chapters
- Cary, IL — 14 chapters
- Casey, IL — 15 chapters
- Centralia, IL — 26 chapters
- Cerro Gordo, Illinois, IL — 66 chapters
- Champaign, IL — 46 chapters
- Channahon, Illinois, IL — 86 chapters
- Charleston, Illinois, IL — 85 chapters
- Chatham, Illinois, IL — 98 chapters
- Chatsworth, Illinois, IL — 48 chapters
- Chebanse, Illinois, IL — 78 chapters
- Chenoa, Illinois, IL — 88 chapters
- Cherry Valley, IL — 25 chapters
- Chicago Heights, IL — 54 chapters
- Chicago Ridge, IL — 59 chapters
- Chicago, Illinois, IL — 579 chapters
- Chillicothe, IL — 55 chapters
- Chrisman, Illinois, IL — 56 chapters
- Christopher, Illinois, IL — 159 chapters
- Cicero, IL — 32 chapters
- Claremont, North Carolina, IL — 58 chapters
- Clifton, IL — 23 chapters
- Clinton, Illinois, IL — 97 chapters
- Coal, IL — 66 chapters
- Coal Valley, IL — 1 chapters
- Collinsville, IL — 15 chapters
- Colona, Illinois, IL — 91 chapters
- Columbia, IL — 2 chapters
- Cook County, IL — 28 chapters
- Cortland, IL — 12 chapters
- Country Club Hills, IL — 23 chapters
- Countryside, Illinois, IL — 143 chapters
- Creal Springs, Illinois, IL — 7 chapters
- Creston, IL — 2 chapters
- Crete, IL — 31 chapters
- Creve Coeur, Illinois, IL — 152 chapters
- Crystal Lake, IL — 113 chapters
- Danville, Illinois, IL — 137 chapters
- Darien, Illinois, IL — 116 chapters
- Davis Junction, IL — 22 chapters
- Davis, Illinois, IL — 45 chapters
- De Land, Illinois, IL — 46 chapters
- Deerfield, Illinois, IL — 210 chapters
- Des Plaines, Illinois, IL — 157 chapters
- DeWitt County, Illinois, IL — 48 chapters
- Diamond, Illinois, IL — 92 chapters
- Dieterich, Illinois, IL — 62 chapters
- Divernon, Illinois, IL — 62 chapters
- Dixon, Illinois, IL — 198 chapters
- Dolton, Illinois, IL — 91 chapters
- DuPage Airport Authority, IL — 20 chapters
- DuPage County, IL — 32 chapters
- Dwight, IL — 43 chapters
- Earlville, IL — 23 chapters
- East Dubuque, Illinois, IL — 110 chapters
- East Dundee, Illinois, IL — 88 chapters
- East Hazel Crest, IL — 24 chapters
- East Moline, Illinois, IL — 186 chapters
- East Peoria, IL — 11 chapters
- East St. Louis, IL — 35 chapters
- Edwardsville, IL — 35 chapters
- Effingham, IL — 27 chapters
- Effingham County, Illinois, IL — 41 chapters
- El Paso, IL — 53 chapters
- Elgin, IL — 23 chapters
- Elk Grove Village, Illinois, IL — 1 chapters
- Elmhurst, IL — 37 chapters
- Elmwood Park, IL — 79 chapters
- Elwood, Illinois, IL — 66 chapters
- Erie, Illinois, IL — 82 chapters
- Eureka, IL — 21 chapters
- Evanston, IL — 15 chapters
- Evergreen Park, Illinois, IL — 27 chapters
- Ewing, IL — 82 chapters
- Fairfield, Illinois, IL — 88 chapters
- Fairmont, IL — 21 chapters
- Farmer City, Illinois, IL — 72 chapters
- Flanagan, Illinois, IL — 4 chapters
- Flora, Illinois, IL — 101 chapters
- Flossmoor, IL — 44 chapters
- Ford Heights, IL — 0 chapters
- Forest Park, Illinois, IL — 104 chapters
- Forest View, Illinois, IL — 158 chapters
- Forrest, IL — 40 chapters
- Forreston, Illinois, IL — 59 chapters
- Forsyth, IL — 12 chapters
- Fox Lake, Illinois, IL — 98 chapters
- Fox Metro Water Reclamation District, IL — 7 chapters
- Frankfort, Illinois, IL — 86 chapters
- Franklin County, Illinois, IL — 49 chapters
- Franklin Grove, Illinois, IL — 73 chapters
- Franklin Park, IL — 12 chapters
- Freeburg, IL — 29 chapters
- Freeport, Illinois, IL — 164 chapters
- Fulton, Illinois, IL — 72 chapters
- Galena, Illinois, IL — 111 chapters
- Galesburg, Illinois, IL — 61 chapters
- Gardner, Illinois, IL — 55 chapters
- Geneseo, IL — 41 chapters
- Geneva, IL — 15 chapters
- Georgetown, IL — 16 chapters
- Germantown Hills, Illinois, IL — 68 chapters
- Gilberts, IL — 13 chapters
- Gilman, IL — 19 chapters
- Glasford, IL — 19 chapters
- Glen Carbon, Illinois, IL — 101 chapters
- Glen Ellyn, IL — 11 chapters
- Glencoe, Illinois, IL — 64 chapters
- Glendale Heights, Illinois, IL — 135 chapters
- Glenview, IL — 52 chapters
- Glenwood, IL — 33 chapters
- Godfrey, IL — 46 chapters
- Godley, Illinois, IL — 50 chapters
- Golf, Illinois, IL — 63 chapters
- Goreville, Illinois, IL — 45 chapters
- Grafton, Illinois, IL — 93 chapters
- Grand Ridge, Illinois, IL — 57 chapters
- Grandview, Illinois, IL — 110 chapters
- Granite, IL — 15 chapters
- Grant Park, Illinois, IL — 92 chapters
- Granville, IL — 41 chapters
- Grayslake, IL — 16 chapters
- Grayville, Illinois, IL — 80 chapters
- Green Oaks, Illinois, IL — 101 chapters
- Greenview, Illinois, IL — 62 chapters
- Greenville, Illinois, IL — 78 chapters
- Grundy County, Illinois, IL — 60 chapters
- Gurnee, IL — 33 chapters
- Hainesville, IL — 16 chapters
- Hamel, Illinois, IL — 29 chapters
- Hamilton, Illinois, IL — 56 chapters
- Hampshire, Illinois, IL — 21 chapters
- Hanover Park, IL — 27 chapters
- Hanover, Illinois, IL — 43 chapters
- Harristown, IL — 22 chapters
- Harvard, IL — 32 chapters
- Harwood Heights, IL — 22 chapters
- Havana, IL — 21 chapters
- Hawthorn Woods, Illinois, IL — 104 chapters
- Hazel Crest, IL — 35 chapters
- Hecker, Illinois, IL — 149 chapters
- Henry County, IL — 9 chapters
- Herrick, Illinois, IL — 36 chapters
- Herscher, Illinois, IL — 71 chapters
- Heyworth, Illinois, IL — 101 chapters
- Hickory Hills, Illinois, IL — 41 chapters
- Highland, IL — 29 chapters
- Highland Park, IL — 10 chapters
- Highwood, Illinois, IL — 119 chapters
- Hillcrest, IL — 0 chapters
- Hillside, IL — 54 chapters
- Hinckley, IL — 25 chapters
- Hinsdale, Illinois, IL — 138 chapters
- Hodgkins, Illinois, IL — 100 chapters
- Hoffman Estates, IL — 19 chapters
- Homer Glen, IL — 24 chapters
- Hometown, IL — 16 chapters
- Homewood, IL — 22 chapters
- Hoopeston, Illinois, IL — 212 chapters
- Hudson, Illinois, IL — 70 chapters
- Huntley, IL — 16 chapters
- Indian Head Park, IL — 25 chapters
- Inverness, Illinois, IL — 91 chapters
- Irvington, IL — 105 chapters
- Itasca, Illinois, IL — 90 chapters
- Jacksonville, IL — 36 chapters
- Jersey County, Illinois, IL — 47 chapters
- Jerseyville, Illinois, IL — 97 chapters
- Jo Daviess County, Illinois, IL — 69 chapters
- Johnston City, Illinois, IL — 80 chapters
- Joliet, IL — 41 chapters
- Justice, Illinois, IL — 19 chapters
- Kane County, Illinois, IL — 42 chapters
- Kankakee County, IL — 34 chapters
- Kansas, Illinois, IL — 5 chapters
- Karnak, Illinois, IL — 63 chapters
- Kendall County, IL — 20 chapters
- Kenilworth, Illinois, IL — 64 chapters
- Kewanee, Illinois, IL — 97 chapters
- Kildeer, Illinois, IL — 144 chapters
- Kingston, IL — 26 chapters
- Kirkland, Illinois, IL — 61 chapters
- La Grange, IL — 8 chapters
- La Grange Park, Illinois, IL — 66 chapters
- Lacon, Illinois, IL — 51 chapters
- Ladd, IL — 16 chapters
- Lake Barrington, Illinois, IL — 119 chapters
- Lake Bluff, Illinois, IL — 111 chapters
- Lake County, Illinois, IL — 70 chapters
- Lake Forest, Illinois, IL — 111 chapters
- Lake Villa, Illinois, IL — 118 chapters
- Lake Zurich, Illinois, IL — 109 chapters
- Lakemoor, Illinois, IL — 62 chapters
- Lanark, Illinois, IL — 17 chapters
- Lansing, IL — 23 chapters
- LaSalle, Illinois, IL — 98 chapters
- Le Roy, IL — 1 chapters
- Leaf River, Illinois, IL — 49 chapters
- Lebanon, IL — 22 chapters
- Lee County, Illinois, IL — 81 chapters
- Leland Grove, Illinois, IL — 55 chapters
- Leland, Illinois, IL — 89 chapters
- Lemont, IL — 16 chapters
- Lewistown, IL — 1 chapters
- Lexington, IL — 50 chapters
- Leyden, Illinois, IL — 35 chapters
- Libertyville, IL — 27 chapters
- Lincoln, IL — 2 chapters
- Lincolnwood, IL — 21 chapters
- Lindenhurst, Illinois, IL — 88 chapters
- Lisle, Illinois, IL — 163 chapters
- Litchfield, IL — 8 chapters
- Livingston County, IL — 22 chapters
- Livingston, Illinois, IL — 59 chapters
- Lockport, Illinois, IL — 88 chapters
- Lombard, IL — 8 chapters
- Long Grove, IL — 14 chapters
- Loves Park, IL — 54 chapters
- Lyndon, IL — 17 chapters
- Lynwood, IL — 58 chapters
- Lyons, Illinois, IL — 151 chapters
- Machesney Park, IL — 40 chapters
- Macomb, IL — 25 chapters
- Macon County, Illinois, IL — 54 chapters
- Macoupin County, Illinois, IL — 48 chapters
- Madison County, Illinois, IL — 59 chapters
- Madison, Illinois, IL — 99 chapters
- Mahomet, Illinois, IL — 60 chapters
- Malta, IL — 20 chapters
- Manhattan, Illinois, IL — 122 chapters
- Manlius, IL — 42 chapters
- Manteno, Illinois, IL — 148 chapters
- Maple Park, IL — 13 chapters
- Marion, Illinois, IL — 136 chapters
- Marissa, Illinois, IL — 65 chapters
- Mark, IL — 17 chapters
- Markham, Illinois, IL — 86 chapters
- Maroa, IL — 39 chapters
- Marquette Heights, Illinois, IL — 108 chapters
- Marseilles, Illinois, IL — 90 chapters
- Marshall, Illinois, IL — 37 chapters
- Martinsville, Illinois, IL — 152 chapters
- Maryville, Illinois, IL — 114 chapters
- Mascoutah, IL — 32 chapters
- Matherville, Illinois, IL — 62 chapters
- Matteson, Illinois, IL — 98 chapters
- Mattoon, Illinois, IL — 90 chapters
- Maywood, Illinois, IL — 91 chapters
- Mazon, Illinois, IL — 68 chapters
- McCook, IL — 50 chapters
- McCullom Lake, IL — 21 chapters
- McHenry County, Illinois, IL — 93 chapters
- McHenry, Illinois, IL — 154 chapters
- McLean County, IL — 29 chapters
- Melrose Park, IL — 17 chapters
- Mendota, IL — 63 chapters
- Merrionette Park, IL — 11 chapters
- Metamora, IL — 18 chapters
- Metropolis, Illinois, IL — 97 chapters
- Mettawa, Illinois, IL — 190 chapters
- Midlothian, Illinois, IL — 178 chapters
- Milan, Illinois, IL — 123 chapters
- Millstadt, Illinois, IL — 74 chapters
- Minooka, Illinois, IL — 121 chapters
- Mokena, Illinois, IL — 108 chapters
- Moline, Illinois, IL — 37 chapters
- Momence, Illinois, IL — 109 chapters
- Monee, Illinois, IL — 109 chapters
- Monmouth, IL — 18 chapters
- Monroe Center, IL — 14 chapters
- Monroe County, IL — 26 chapters
- Montgomery, IL — 37 chapters
- Monticello, Illinois, IL — 58 chapters
- Morris, IL — 48 chapters
- Morrison, IL — 34 chapters
- Morrisonville, IL — 43 chapters
- Morton Grove, IL — 13 chapters
- Mount Carmel, IL — 30 chapters
- Mount Carroll, Illinois, IL — 109 chapters
- Mount Morris, Illinois, IL — 90 chapters
- Mount Prospect, Illinois, IL — 29 chapters
- Mount Pulaski, Illinois, IL — 109 chapters
- Mount Vernon, Illinois, IL — 63 chapters
- Moweaqua, Illinois, IL — 53 chapters
- Mt. Zion, IL — 28 chapters
- Mundelein, IL — 19 chapters
- Naperville, IL — 12 chapters
- Nashville, Illinois, IL — 55 chapters
- Nauvoo, Illinois, IL — 99 chapters
- Neoga, IL — 0 chapters
- New Athens, IL — 24 chapters
- New Lenox, IL — 32 chapters
- Niantic, IL — 37 chapters
- Niles, IL — 64 chapters
- Norridge, IL — 27 chapters
- North Aurora, IL — 16 chapters
- North Barrington, Illinois, IL — 88 chapters
- North Chicago, IL — 15 chapters
- North Pekin, Illinois, IL — 116 chapters
- North Riverside, IL — 17 chapters
- North Utica, Illinois, IL — 97 chapters
- Northbrook, IL — 24 chapters
- Northeast Illinois Regional Commuter Railroad Corporation, Illinois, IL — 34 chapters
- Northfield, IL — 22 chapters
- Northlake, Illinois, IL — 137 chapters
- O'Fallon, Illinois, IL — 85 chapters
- Oak Brook, Illinois, IL — 136 chapters
- Oak Forest, Illinois, IL — 73 chapters
- Oak Lawn, Illinois, IL — 168 chapters
- Oak Park, Illinois, IL — 38 chapters
- Oakbrook Terrace, IL — 16 chapters
- Oakwood, IL — 41 chapters
- Ogle County, Illinois, IL — 85 chapters
- Oglesby, IL — 15 chapters
- Old Mill Creek, Illinois, IL — 47 chapters
- Olympia Fields, IL — 22 chapters
- Onarga, IL — 15 chapters
- Oreana, Illinois, IL — 64 chapters
- Orland Hills, Illinois, IL — 104 chapters
- Orland Park, Illinois, IL — 287 chapters
- Oswego, IL — 13 chapters
- Ottawa, IL — 35 chapters
- Palatine, IL — 19 chapters
- Palos Heights, Illinois, IL — 110 chapters
- Palos Hills, IL — 14 chapters
- Palos Park, Illinois, IL — 181 chapters
- Pana, IL — 25 chapters
- Paris, Illinois, IL — 93 chapters
- Park, IL — 18 chapters
- Park Forest, IL — 62 chapters
- Park Ridge, IL — 23 chapters
- Paw Paw, IL — 33 chapters
- Pawnee, Illinois, IL — 90 chapters
- Paxton, Illinois, IL — 89 chapters
- Pekin, IL — 9 chapters
- Peoria, IL — 37 chapters
- Peoria County, IL — 27 chapters
- Peoria Heights, Illinois, IL — 92 chapters
- Peotone, Illinois, IL — 126 chapters
- Peru, IL — 34 chapters
- Phoenix, IL — 28 chapters
- Pinckneyville, Illinois, IL — 85 chapters
- Pingree Grove, Illinois, IL — 104 chapters
- Pittsfield, Illinois, IL — 92 chapters
- Plainfield, IL — 13 chapters
- Plano, Illinois, IL — 130 chapters
- Polo, Illinois, IL — 77 chapters
- Pontiac, IL — 46 chapters
- Pontoon Beach, IL — 26 chapters
- Poplar Grove, IL — 11 chapters
- Posen, Illinois, IL — 220 chapters
- Princeton, Illinois, IL — 95 chapters
- Princeville, IL — 14 chapters
- Prophetstown, IL — 19 chapters
- Prospect Heights, Illinois, IL — 139 chapters
- Quincy, Illinois, IL — 125 chapters
- Ramsey, Illinois, IL — 56 chapters
- Rantoul, IL — 23 chapters
- Raritan, IL — 58 chapters
- Red Bud, IL — 9 chapters
- Richton Park, Illinois, IL — 180 chapters
- River Forest, Illinois, IL — 161 chapters
- River Grove, Illinois, IL — 218 chapters
- Riverside, Illinois, IL — 166 chapters
- Riverton, Illinois, IL — 59 chapters
- Riverwoods, Illinois, IL — 93 chapters
- Roanoke, Illinois, IL — 107 chapters
- Rochelle, IL — 30 chapters
- Rochester, Illinois, IL — 70 chapters
- Rock Falls, IL — 35 chapters
- Rock Island County, Illinois, IL — 56 chapters
- Rock Island, Illinois, IL — 27 chapters
- Rockdale, IL — 24 chapters
- Rockford, IL — 2 chapters
- Rolling Meadows, IL — 65 chapters
- Romeoville, Illinois, IL — 106 chapters
- Roscoe, IL — 13 chapters
- Roselle, IL — 26 chapters
- Rosemont, Illinois, IL — 143 chapters
- Round Lake Beach, IL — 12 chapters
- Round Lake Heights, IL — 11 chapters
- Round Lake Park, IL — 13 chapters
- Roxana, Illinois, IL — 84 chapters
- Rushville, IL — 24 chapters
- Saint Anne, Illinois, IL — 43 chapters
- Saint Joseph, Illinois, IL — 81 chapters
- Salem, IL — 24 chapters
- San Jose, Illinois, IL — 61 chapters
- Sandwich, IL — 26 chapters
- Sauk, IL — 23 chapters
- Savanna, Illinois, IL — 119 chapters
- Savoy, IL — 15 chapters
- Scales Mound, Illinois, IL — 62 chapters
- Schaumburg, IL — 10 chapters
- Schiller Park, Illinois, IL — 110 chapters
- Seneca, Illinois, IL — 107 chapters
- Shabbona, IL — 30 chapters
- Shannon, Illinois, IL — 61 chapters
- Shelbyville, IL — 0 chapters
- Sherman, Illinois, IL — 69 chapters
- Shiloh, Illinois, IL — 55 chapters
- Shorewood, Illinois, IL — 134 chapters
- Sidney, IL — 30 chapters
- Silvis, IL — 31 chapters
- Skokie, IL — 64 chapters
- Sleepy Hollow, IL — 9 chapters
- South Barrington, Illinois, IL — 116 chapters
- South Beloit, IL — 31 chapters
- South Chicago Heights, IL — 23 chapters
- South Elgin, Illinois, IL — 81 chapters
- South Holland, IL — 27 chapters
- South Jacksonville, Illinois, IL — 47 chapters
- South Pekin, Illinois, IL — 82 chapters
- South Roxana, Illinois, IL — 54 chapters
- Southern View, Illinois, IL — 72 chapters
- Sparta, Illinois, IL — 77 chapters
- Spaulding, Illinois, IL — 98 chapters
- Spring Valley, Illinois, IL — 164 chapters
- Springfield, IL — 10 chapters
- St. Charles, IL — 17 chapters
- Staunton, Illinois, IL — 29 chapters
- Steger, IL — 27 chapters
- Stephenson County, IL — 45 chapters
- Sterling, IL — 58 chapters
- Stickney, IL — 51 chapters
- Stillman Valley, IL — 12 chapters
- Stockton, Illinois, IL — 104 chapters
- Stone Park, Illinois, IL — 74 chapters
- Streamwood, Illinois, IL — 121 chapters
- Streator, IL — 18 chapters
- Stronghurst, Illinois, IL — 53 chapters
- Sugar Grove, Illinois, IL — 101 chapters
- Sun River Terrace, IL — 20 chapters
- Swansea, Illinois, IL — 70 chapters
- Sycamore, Illinois, IL — 104 chapters
- Tampico, IL — 15 chapters
- Taylorville, Illinois, IL — 138 chapters
- Tazewell County, Illinois, IL — 47 chapters
- Teutopolis, Illinois, IL — 64 chapters
- Third Lake, IL — 17 chapters
- Thornton, IL — 1 chapters
- Tilton, IL — 51 chapters
- Tinley Park, Illinois, IL — 160 chapters
- Tolono, Illinois, IL — 59 chapters
- Toluca, Illinois, IL — 78 chapters
- Tremont, Illinois, IL — 77 chapters
- Trenton, IL — 25 chapters
- Troy, Illinois, IL — 73 chapters
- Tuscola, Illinois, IL — 97 chapters
- University Park, IL — 11 chapters
- Urbana, IL — 31 chapters
- Vandalia, IL — 17 chapters
- Vernon Hills, IL — 32 chapters
- Vienna, Illinois, IL — 61 chapters
- Villa Grove, Illinois, IL — 78 chapters
- Villa Park, IL — 32 chapters
- Virginia, Illinois, IL — 80 chapters
- Volo, IL — 11 chapters
- Wadsworth, Illinois, IL — 107 chapters
- Walnut, IL — 17 chapters
- Wapella, Illinois, IL — 51 chapters
- Warrensburg, IL — 45 chapters
- Warrenville, Illinois, IL — 120 chapters
- Washburn, Illinois, IL — 50 chapters
- Washington, IL — 56 chapters
- Waterloo, Illinois, IL — 28 chapters
- Waterman, Illinois, IL — 82 chapters
- Watseka, Illinois, IL — 141 chapters
- Wauconda, IL — 9 chapters
- Waukegan, IL — 25 chapters
- Waverly, IL — 36 chapters
- Wayne, Illinois, IL — 108 chapters
- Weldon, Illinois, IL — 44 chapters
- Wenona, Illinois, IL — 79 chapters
- West Chicago, IL — 29 chapters
- West Dundee, Illinois, IL — 109 chapters
- West Frankfort, IL — 17 chapters
- Westchester, IL — 15 chapters
- Western Springs, Illinois, IL — 144 chapters
- Westmont, IL — 59 chapters
- Westville, IL — 54 chapters
- Wheaton, IL — 46 chapters
- Wheeling, IL — 22 chapters
- Whiteside County, IL — 22 chapters
- Will County, Illinois, IL — 113 chapters
- Williamsville, IL — 41 chapters
- Willowbrook, Illinois, IL — 137 chapters
- Wilmette, IL — 17 chapters
- Wilmington, IL — 11 chapters
- Winfield, Illinois, IL — 133 chapters
- Winnebago County, IL — 52 chapters
- Winnetka, IL — 18 chapters
- Winthrop Harbor, Illinois, IL — 96 chapters
- Wonder Lake, IL — 8 chapters
- Wood Dale, Illinois, IL — 23 chapters
- Wood River, Illinois, IL — 85 chapters
- Woodridge, Illinois, IL — 90 chapters
- Woodstock, Illinois, IL — 90 chapters
- Worth, Illinois, IL — 175 chapters
- Yorkville, IL — 11 chapters
- Zion, IL — 30 chapters