2022-2023 ICNS Member Schools
| Academy of St. Benedict the African | Chicago |
| All Saints Academy | Breese |
| Agape Christian High School | Marion |
| Altamont Lutheran Interparish School | Altamont |
| Altus Academy | Chicago |
| American School | Lansing |
| Arie Crown Hebrew Day School | Skokie |
| Aurora Central Catholic High School | Aurora |
| Aurora Christian Schools, Inc. | Aurora |
| Beverly Montessori School | Chicago |
| Brother Rice High School | Chicago |
| Buffalo Grove Montessori School | Buffalo Grove |
| Calvary Academy | South Holland |
| Calvary Academy | Springfield |
| Calvary Christian Academy | Normal |
| Calvary Christian School | Naperville |
| Calvin Christian School | South Holland |
| Campus Middle School for Girls | Urbana |
| Carriers of Light | Wheaton |
| Cathedral of St. Raymond School | Joliet |
| Catherine Cook School | Chicago |
| Chiaravalle Montessori School | Evanston |
| Chicago Academy for the Arts | Chicago |
| Chicago Prep Academy | Chicago |
| Chicago West Side Christian School | Chicago |
| Christ Lutheran High School | Buckley |
| Christ Lutheran School Association | Sterling |
| Christ the King Lutheran | Chicago |
| Christ the King School | Springfield |
| Cornerstone Christian Academy | Bloomington |
| Cornerstone Christian School | Chicago Heights |
| Countryside Day School | Northbrook |
| Daystar Academy | Chicago |
| Elgin Academy | Elgin |
| Francis W. Parker | Chicago |
| Good Shepherd Lutheran | Collinsville |
| Governor French Academy | Belleville |
| Grace Lutheran School | Chicago |
| Hanna Sacks High School | Chicago |
| Holy Family | Chicago |
| Holy Family Parish School | Peoria |
| Ida Crown Jewish Academy | Skokie |
| Immanuel Lutheran School | Crystal Lake |
| Immanuel Lutheran School | Elmhurst |
| Immanuel | Belvidere |
| Immanuel Lutheran School | Palatine |
| Joan Dachs Bais Yaakov | Chicago |
| Lake Forest Academy | Lake Forest |
| Lansing Christian School | Lansing |
| Leo Catholic High School | Chicago |
| Lycee Francais de Chicago | Chicago |
| MCC Academy | Skokie |
| Marmion Academy | Aurora |
| Montessori School of Lemont | Lemont |
| Montini Catholic High School | Lombard |
| Mount Carmel High School | Chicago |
| Noonan Elementary Academy | Mokena |
| North Shore Country Day School | Winnetka |
| Our Savior's Lutheran School | Springfield |
| Pilgrim Lutheran | Chicago |
| Rockford Christian Schools | Rockford |
| Rockford Lutheran School | Rockford |
| Rogers Park Montessori | Chicago |
| Ronald Knox Montessori School | Wilmette |
| Sacred Heart - Griffin | Springfield |
| Sacred Heart Schools | Chicago |
| Saint Ignatius College Prep | Chicago |
| Science Arts & Academy | Des Plaines |
| Seton Montessori Institute & School | Clarendon Hills |
| Skokie Montessori School | Skokie |
| Solomon Schechter Day School | Northbrook |
| South Side Christian Academy | Peoria |
| Spectrum School | Rockford |
| Springfield Christian School | Springfield |
| St. Andrews Lutheran School | Park Ridge |
| St. Bede Academy | Peru |
| St. Dennis | Lockport |
| St. Francis High School | Wheaton |
| St. James Lutheran | Quincy |
| St. John's Lutheran | Bloomington |
| St. Malachy School | Rantoul |
| St. Matthew School | Champaign |
| St. Michael | Orland Park |
| St. Patrick | Washington |
| St. Paul Lutheran School | Aurora |
| St. Paul Lutheran School | Chicago |
| St. Paul's Lutheran School | Bourbonnais |
| St. Peter | Arlington Heights |
| St. Peter Lutheran | Schaumburg |
| St. Rita of Cascia High School | Chicago |
| St. Theresa School | Palatine |
| St. Thomas School | Peoria Heights |
| The Avery Coonley School | Downers Grove |
| The Frances Xavier Ward School | Chicago |
| Timothy Christian Schools | Elmhurst |
| Trinity Christian School | Shorewood |
| Trinity Lutheran | Burr Ridge |
| Trinity Lutheran School | Danville |
| Trinity Lutheran School | Stewardson |
| Trinity Oaks Christian Academy | Cary |
| Universal School | Bridgeview |
| Wheaton Academy | West Chicago |
| Willows Academy | Des Plaines |
| Woodlands Academy of the Sacred Heart | Lake Forest |
| Zion Lutheran School | Staunton |
5/30/2023