| KLA Schools of Naperville | 1440 Tuthill Road, Naperville, IL 60563 | Preschool |
| Kensington School | 2215 York Rd Ste 204, Oak Brook, IL 60523 | Center |
| Kensington School of The Highlands | 2215 York Rd Ste 203, Oak Brook, IL 60523 | Center |
| Kensington School of Western Springs | 1500 Walker St, Western Springs, IL 60558 | Center |
| Kiddie Academy | 314 Juliana Ln, Bloomingdale, IL 60108 | Preschool |
| Kiddyplace Learning Center | 1871 N Neltnor Blvd, West Chicago, IL 60185 | Center |
| Kids Kampus | 603 E Diehl Rd, Naperville, IL 60563 | Preschool |
| Kidtown, USA | 1071 S Roselle Rd, Schaumburg, IL 60193 | Center |
| Kingswood Academy Preschool | 133 Plainfield Rd, Darien, IL 60561 | Preschool |
| Knowledge Learning Corporation | 22w300 Sunnyside Rd, Medinah, IL 60157 | Center |
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| Lads and Lassies Pre-School | 1001 Hinsbrook Ave, Darien, IL 60561 | Preschool |
| Lads and Lassies Pre-School | 7338 Richmond Ave, Darien, IL 60561 | Preschool |
| Ladse Learning Center Preschool | 7302 Clarendon Hills, Darien, IL 60561 | Preschool |
| Learning Is Fun Nursery School | 1313 North Mill Street, Naperville, IL 60563 | Preschool |
| Let Us Care Montessori School | 206 Rush St, Roselle, IL 60172 | Preschool |
| Lifelink Bensenville Home Soc Headstart | 331 S York Rd, Bensenville, IL 60106 | Preschool |
| Lifelink Head Start Gary Ave | 331 S York Rd, Bensenville, IL 60106 | Preschool |
| Lifelink Headstart - Wheaton | 331 S York Rd, Bensenville, IL 60106 | Preschool |
| Little Achievers Child Care Develop Center | 539 Bellwood Ave, Bellwood, IL 60104 | Center |
| Little Kids & Kompany | 3042 Hobson Rd, Woodridge, IL 60517 | Center |
| Little People Learning Center | 2144 Curtiss St # 2146, Downers Grove, IL 60516 | Preschool |
| Little Prince Day Care II | 233 N MILL RD, Addison, IL 60101 | Center |
| Little Shepherd Day Care | 24 N Hillside Ave, Hillside, IL 60162 | Center |
| Little Sprouts Day Care Center | 324 N York St, Elmhurst, IL 60126 | Center |
| Living Lord Lutheran Church Preschool | 1044 Congress Dr, Bartlett, IL 60103 | Preschool |
| Living Word Christian Academy Preschool | 501 Bellwood Ave, Bellwood, IL 60104 | Preschool |
| Lombard Park District - Kiddie Campus Preschool | 820 S Finley Rd, Lombard, IL 60148 | Preschool |
| Lor-Jon Montessori Pre-School | 367 S Spring Rd, Elmhurst, IL 60126 | Preschool |
| Lor-Jon Montessori School | 367 S Spring Rd, Elmhurst, IL 60126 | Preschool |
| Louise M. Beem ECEC Demonstration Center | 425 Fawell Blvd, Glen Ellyn, IL 60137 | Preschool |
| Lutheran School of St Luke | 410 S Rush St, Itasca, IL 60143 | Preschool |
| Madison Elementary School Preschool | 150 W Madison St, Lombard, IL 60148 | Preschool |
| Madison Elementary School Preschool | 1620 Mayo Ave, Wheaton, IL 60189 | Preschool |
| Maple Tree Academy | 3331 Hobson Rd, Woodridge, IL 60517 | Preschool |
| Mark Delay School Preschool | 6801 Wilmette Ave, Darien, IL 60561 | Preschool |
| Marklund Day School | 164 S Prairie Ave, Bloomingdale, IL 60108 | Preschool |
| Marquette Manor Baptist Academy Preschool | 333 75th St, Downers Grove, IL 60516 | Preschool |
| Master's Christian Pre-School | 3n580 Kuhn Road, Carol Stream, IL 60188 | Preschool |
| Me, Mines & Ours Daycare | 1002 Bellwood Ave # 4, Bellwood, IL 60104 | Center |
| Meadowview Elementary School Preschool | 2525 Mitchell Dr, Woodridge, IL 60517 | Preschool |
| Meca Elementary School Preschool Preschool | 425 Bohland Ave, Bellwood, IL 60104 | Preschool |
| Medinah Christian School Preschool | 900 Foster Ave, Medinah, IL 60157 | Preschool |
| Michael Collins Elementary School Preschool | 407 Summit Dr, Schaumburg, IL 60193 | Preschool |
| Mini Steps | 5600 Arlington Dr E, Hanover Park, IL 60133 | Center |
| Mom's In School | 643 E Washington St, West Chicago, IL 60185 | Center |
| Monroe Elementary School Preschool | 210 N Madison St, Hinsdale, IL 60521 | Preschool |
| Montessori Academy of Glen Ellen Preschool | 927 N Main St, Glen Ellyn, IL 60137 | Preschool |
| Montessori Academy of Glen Ellyn | 927 N Main St, Glen Ellyn, IL 60137 | Preschool |
| Montessori Childrens Academy | 706 E Park Blvd, Villa Park, IL 60181 | Preschool |
| Montessori Moppet Centre | 25w530 75th St, Naperville, IL 60565 | Preschool |
| Montessori Pebbles | 7516 S Cass Ave, Darien, IL 60561 | Preschool |
| Montessori School of Burr Ridge | 126 68th St, Darien, IL 60561 | Center |
| Montessori School of Burr Ridge | 15w431 E 59th St, Willowbrook, IL 60527 | Preschool |
| Montessori School of Lisle | 23w550 Hobson Rd, Naperville, IL 60540 | Preschool |
| Montessori School of Western Springs Preschool | 1500 Walker St, Western Springs, IL 60558 | Preschool |
| Montessori of Woodridge | 6953 Woodridge Dr, Woodridge, IL 60517 | Preschool |
| Montessori of Woodrige | 6953 Woodridge Dr, Woodridge, IL 60517 | Preschool |
| Mother Goose Day Care Center | 1809 S Wolf Rd, Hillside, IL 60162 | Center |
| Nalco Child Care Center | 1601 W Diehl Rd, Naperville, IL 60563 | Preschool |
| Nathan Hale Elementary School Preschool | 1300 W Wise Rd, Schaumburg, IL 60193 | Preschool |
| New Day Montessori | 25w007 75th St, Naperville, IL 60565 | Preschool |
| New Morning Childrens House | 400 N Walnut St, Itasca, IL 60143 | Preschool |
| Norton Creek Elementary School Preschool | 2033 Smith Rd, West Chicago, IL 60185 | Preschool |
| Notre Dame School Preschool | 66 Norfolk Ave, Clarendon Hills, IL 60514 | Preschool |
| Nursery School of Congregation Etz Chaim | 1710 S Highland Ave, Lombard, IL 60148 | Center |
| Oak Brook Christian | 3100 Midwest Rd, Oak Brook, IL 60523 | Preschool |
| Oak Brook Christian School | 3100 Midwest Rd, Oak Brook, IL 60523 | Center |
| Oakbrook KinderCare - CLOSED | 1111 Pasquinelli Dr. #300, Westmont, IL 60559 | Preschool |
| Oakbrook Terrace Park District Preschool | 1s325 Ardmore Ave, Villa Park, IL 60181 | Preschool |
| Our Lady of Peace Preschool | 709 Plainfield Rd, Darien, IL 60561 | Preschool |
| Our Savior Lutheran Church | 1244 W Army Trail Rd, Carol Stream, IL 60188 | Preschool |
| Outreach Community Center Jubilee Neighbor | 345 S President St, Carol Stream, IL 60188 | Preschool |
| Parent-Child Program of Hinsdale United Methodist | 945 S Garfield St, Hinsdale, IL 60522 | Preschool |
| Park View Elementary School Preschool | 250 S Park Blvd, Glen Ellyn, IL 60137 | Preschool |
| Peace Community Learning Center | 21w500 Butterfield Rd, Lombard, IL 60148 | Preschool |
| Peter Pan Early Learning Center | 2532 Hobson Rd, Downers Grove, IL 60516 | Preschool |
| Peter Pan Early Learning Center | 6551 S Cass Ave Ste B, Westmont, IL 60559 | Preschool |
| Peter Pan Early Learning Center | 24w760 75th St, Naperville, IL 60565 | Preschool |
| Peter Pan North | 6682 Double Eagle Dr Apt 203, Woodridge, IL 60517 | Preschool |
| Pheasant Ridge Primary School Preschool | 43 E Stevenson Dr, Glendale Heights, IL 60139 | Preschool |
| Pilgrim Preschool | 535 Forest Ave, Glen Ellyn, IL 60137 | Preschool |
| Pioneer Child Care Service | 543 E Taylor Rd, Lombard, IL 60148 | Preschool |
| Pixi & Dixi Day Care Center | 1054 Fairway Dr, Bensenville, IL 60106 | Center |
| Prairie Path Preschool | 1420 S Gables Blvd, Wheaton, IL 60189 | Preschool |
| Prairieview Elementary School Preschool | 699 Plainfield Rd, Downers Grove, IL 60516 | Preschool |
| Procare Early Headstart Center | 330 Eastern Ave, Bellwood, IL 60104 | Preschool |
| Pythagoras Childrens Academy Preschool | 893 N Church Rd, Elmhurst, IL 60126 | Preschool |
| Queen of The Rosary School Preschool | 690 W Elk Grove Blvd, Elk Grove Village, IL 60007 | Preschool |
| Raggedy Anne Learning Center | Po Box 46, Elmhurst, IL 60126 | Center |
| Rainbow Academy | 1280 Kuhn Rd, Carol Stream, IL 60188 | Preschool |
| Rainbow Place Preschool | 41 Park Boulevard, Glen Ellyn, IL 60137 | Preschool |
| Ray Walker Head Start | 653 Windsor Dr, Schaumburg, IL 60193 | Preschool |
| Raymond Benson Primary School Preschool | 301 E Washington St, Itasca, IL 60143 | Preschool |
| Reskin Elementary School Preschool | 1555 Ardmore Ave, Glendale Heights, IL 60139 | Preschool |
| Rosehill Montessori School | 1203 Lisle Pl, Lisle, IL 60532 | Preschool |
| Roy De Shane Elementary School Preschool | 475 Chippewa Trl, Carol Stream, IL 60188 | Preschool |
| Sacred Heart Preschool | 322 W Maple St, Lombard, IL 60148 | Preschool |
| Salt Creek Elementary School Preschool | 980 S Riverside Dr, Elmhurst, IL 60126 | Preschool |
| Schafer Elementary School Preschool | 700 E Pleasant Ln, Lombard, IL 60148 | Preschool |
| Schick's Crossing Preschool | 300 Schick Rd, Bartlett, IL 60103 | Preschool |