| JCC at Beth Shalom | 3433 Walters Ave, Northbrook, IL 60062 | Preschool |
| JCC at Woodland Commons | 370 W Half Day Rd, Buffalo Grove, IL 60089 | Preschool |
| JCYS Northeast Family Center | 1700 Weiland Rd, Buffalo Grove, IL 60089 | Preschool |
| Jane Addams Elementary School Preschool | 1020 E Sayles Dr, Palatine, IL 60074 | Preschool |
| Jefferson School Preschool | 8200 W Greendale Ave, Niles, IL 60714 | Preschool |
| Jennifer's Child Care & Learning Center | Po Box 674, Elk Grove Village, IL 60009 | Center |
| Jennifer's Kids Learning Center | 1624 W Wise Rd, Schaumburg, IL 60193 | Center |
| Jennifer's Preschool & Childcare | Po Box 674, Elk Grove Village, IL 60009 | Preschool |
| Jfh Academy Preschool | 1001 Oak Ave, Prospect Heights, IL 60070 | Preschool |
| John G Conyers Learning Academy | 2800 Central Rd, Rolling Meadows, IL 60008 | Preschool |
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| John Jay Elementary School Preschool | 1835 W Pheasant Trl, Mount Prospect, IL 60056 | Preschool |
| John Muir Literacy Academy Preschool | 1973 Kensington Ln, Hoffman Estates, IL 60169 | Preschool |
| Jolly Fun House Playschool West | 1001 Oak Ave, Prospect Heights, IL 60070 | Center |
| Joyce Kilmer Elementary School Preschool | 655 Golfview Ter, Buffalo Grove, IL 60089 | Preschool |
| Juliette Low Elementary School Preschool | 1530 S Highland Ave, Arlington Heights, IL 60005 | Preschool |
| Kiddie Garden | 9130 W Golf Rd, Niles, IL 60714 | Preschool |
| Kiddie Junction Educational Institute | 1619 E Oakton St, Des Plaines, IL 60018 | Center |
| Kiddy Garden | 1250 W. Old McHenry Ct., Lake Zurich, IL 60047 | Preschool |
| Kiddy Garden Child Care Center | 2203 W Schaumburg Rd # 2209, Schaumburg, IL 60194 | Center |
| Kiddy Learning Station | 1340 W Algonquin Rd # 1372, Arlington Heights, IL 60005 | Center |
| Kids Academy | 9233 Shermer Rd, Morton Grove, IL 60053 | Preschool |
| Kids Kare DayCare and Preschool - South Barrington Park District | 3 Tennis Club Ln, Barrington, IL 60010 | Preschool |
| Kids of The Kingdom | 1122 W Rand Rd, Arlington Heights, IL 60004 | Center |
| Kidtown, USA | 1071 S Roselle Rd, Schaumburg, IL 60193 | Center |
| Kimball Day Care Center & Kindergarten | Po Box 450, Barrington, IL 60011 | Center |
| Kingswood Preschool | 401 W Dundee Rd, Buffalo Grove, IL 60089 | Preschool |
| Knowledge Beginnings | 2401 Compass Rd, Glenview, IL 60026 | Preschool |
| Knowledge Learning Corp / Knowledge Beginn | 1375 Remington Rd, Schaumburg, IL 60173 | Center |
| Knowledge Learning Corp School Partnership | 777 Checker Dr, Buffalo Grove, IL 60089 | Center |
| Knowledge Learning Corporation | 22w300 Sunnyside Rd, Medinah, IL 60157 | Center |
| Kripa Montessori School | 603 Randi Ln, Hoffman Estates, IL 60169 | Center |
| Kripa Montessori School | 1021 N SALEM DR, Schaumburg, IL 60194 | Center |
| Kripa Montessori School HE | 1015 W Golf Rd, Hoffman Estates, IL 60169 | Preschool |
| L & L Bright Beginnings Pre-School | 25 Mayer Ave, Wheeling, IL 60090 | Preschool |
| Lakeview Elementary School Preschool | 615 Lakeview Ln, Hoffman Estates, IL 60169 | Preschool |
| Laura B Sprague School Preschool | 2425 Riverwoods Rd, Lincolnshire, IL 60069 | Preschool |
| Learning Express Child Care | 7750 W DEVON AVE # 54, Chicago, IL 60631 | Center |
| Learning Loft | 655 N 1st Bank Dr, Palatine, IL 60067 | Center |
| 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 |
| Lincoln Prairie School | 500 Hillcrest Blvd, Hoffman Estates, IL 60169 | Preschool |
| Lincolnshire Community Nursery School | 30 Riverwoods Rd, Lincolnshire, IL 60069 | Preschool |
| Lincolnshire Montessori School | 1970 Riverwoods Rd, Lincolnshire, IL 60069 | Preschool |
| Little Angels Christian Preschool | 647 Dundee Ave, Barrington, IL 60010 | Preschool |
| Little Bison Day Care Center | 1100 W Dundee Rd, Buffalo Grove, IL 60089 | Preschool |
| Little Hands Child Development Center | 2755 Sanders Rd, Northbrook, IL 60062 | Preschool |
| Little Lamb Christian Preschool & Kindergarten | 946 E Thacker St, Des Plaines, IL 60016 | Preschool |
| Little Learners Educational Center | 1060 W Rand Rd, Arlington Heights, IL 60004 | Preschool |
| Little Saints Christian Preschool | 630 S Quentin Rd, Palatine, IL 60067 | Preschool |
| Little University | 1250 Radcliffe Rd, Buffalo Grove, IL 60089 | Preschool |
| Long Grove Country School | 20400 Old Hicks Rd, Lake Zurich, IL 60047 | Preschool |
| Lotus Montessori School | 3805 Huntington Blvd, Hoffman Estates, IL 60192 | Preschool |
| Lutheran General Children's Daycare O Hare | 2300 E Devon Ave, Des Plaines, IL 60018 | Center |
| Lutheran General Childrens Daycare Desplains | 9375 W Church St, Des Plaines, IL 60016 | Center |
| Lutheran School of St Luke | 410 S Rush St, Itasca, IL 60143 | Preschool |
| Lyon Elementary School Preschool | 1335 Waukegan Rd, Glenview, IL 60025 | Preschool |
| Magic Island | 1141 N Arlington Heights Rd, Buffalo Grove, IL 60089 | Center |
| Mark Twain Elementary School Preschool | 515 E Merle Ln, Wheeling, IL 60090 | Preschool |
| Marklund Day School | 164 S Prairie Ave, Bloomingdale, IL 60108 | Preschool |
| Mary Seat of Wisdom Preschool | 1352 S Cumberland, Park Ridge, IL 60068 | Preschool |
| Meadowbrook Elementary School Preschool | 1600 Walters Ave, Northbrook, IL 60062 | Preschool |
| Medallion School Partnerships - Willow Gro | 777 Checker Dr, Buffalo Grove, IL 60089 | Center |
| Medinah Christian School Preschool | 900 Foster Ave, Medinah, IL 60157 | Preschool |
| Melzer School Preschool | 9400 Oriole Ave, Morton Grove, IL 60053 | Preschool |
| Messiah Lutheran Child Care Center | 1605 Vernon Ave, Park Ridge, IL 60068 | Center |
| Michael Collins Elementary School Preschool | 407 Summit Dr, Schaumburg, IL 60193 | Preschool |
| Mon Jardin | 20630 Milwaukee Ave, Deerfield, IL 60015 | Preschool |
| Montessori Children's House | 1500 Wilmot Rd, Deerfield, IL 60015 | Preschool |
| Montessori Learning Center | 1011 W Golf Rd # 1015, Hoffman Estates, IL 60169 | Center |
| Montessori Learning Center | 1819 N Yale Ave, Arlington Heights, IL 60004 | Preschool |
| Montessori Learning Center of Edison Park | 6740 N Oliphant Ave, Chicago, IL 60631 | Preschool |
| Montessori School of Long Grove | 1115 Rfd, Lake Zurich, IL 60047 | Preschool |
| Montessori School of Long Grove Preschool | 1115 Rfd, Lake Zurich, IL 60047 | Preschool |
| Montessori School of North Hoffman Preschool | 1200 Freeman Rd, Hoffman Estates, IL 60192 | Preschool |
| Montessori Schoolhouse | 501 S Emerson St, Mount Prospect, IL 60056 | Preschool |
| Montessori World of Discovery | 1395 N Arlington Heights Rd, Buffalo Grove, IL 60089 | Preschool |
| Montessori World of Discovery | 1395 N Arlington Hts, Buffalo Grove, IL 60089 | Preschool |
| Moriah Preschool Day Care Center | 200 Taub Dr, Deerfield, IL 60015 | Preschool |
| Motorola Child Care & Education Centers | 1315 E Algonquin Road, Schaumburg, IL 60196 | Center |
| Mount Prospect Child Care Center | 406 E Northwest Hwy # 408, Mount Prospect, IL 60056 | Preschool |
| Nathan Hale Elementary School Preschool | 1300 W Wise Rd, Schaumburg, IL 60193 | Preschool |
| Nathaniel Hawthorne EC School Preschool | 200 Glendale St, Wheeling, IL 60090 | Preschool |
| Neil Armstrong Elementary School Preschool | 1320 Kingsdale Rd, Hoffman Estates, IL 60169 | Preschool |
| New Morning Childrens House | 400 N Walnut St, Itasca, IL 60143 | Preschool |
| North Austin Lutheran Head Start | 1001 E Touhy Ave Ste 50, Des Plaines, IL 60018 | Preschool |
| North Suburban YMCA | 2705 Techny Rd, Northbrook, IL 60062 | Center |
| Northbrook Community Nursery School | Po Box 2204, Northbrook, IL 60065 | Preschool |
| Northwest Suburban Day Care Center | 1755 Howard Ave, Des Plaines, IL 60018 | Center |
| Northwest Suburban Montessori School | 800 N Fernandez Ave, Arlington Heights, IL 60004 | Preschool |
| Northwest Suburban Montessori School Preschool | 800 N Fernandez Ave, Arlington Heights, IL 60004 | Preschool |
| One Leap Ahead Learning Center and Child Care | 3588 Milwaukee Ave, Northbrook, IL 60062 | Center |
| Open Arms Christian Child Development Center | 1850 Chestnut Ave, Glenview, IL 60025 | Center |
| Orchard Place Elementary School Preschool | 2727 Maple St, Des Plaines, IL 60018 | Preschool |
| Our Lady of Destiny Preschool | 1880 Ash St, Des Plaines, IL 60018 | Preschool |
| Our Lady of Perpetual Help Preschool | 1123 Church St, Glenview, IL 60025 | Preschool |
| Our Lady of The Wayside Preschool | 432 S Mitchell Ave, Arlington Heights, IL 60005 | Preschool |
| Palatine Park Dist. Preschool-maple Park | 250 E Wood St, Palatine, IL 60067 | Preschool |
| Palatine Park District Preschool - Birchwood | 250 E Wood St, Palatine, IL 60067 | Preschool |