Illinois School District Calendars
Illinois lists 10 districts from the K12Cal directory of large school districts, with 518,987 students recorded in that directory. The largest listed district is Chicago Public Schools Dist 299 in Chicago, with 322,809 students. 2 districts have published 2026-27 calendars, linked below. Every other row links to the district website. K12Cal does not fill in missing dates.
Published 2026-27 calendars
All Illinois districts in the directory
A calendar link appears only when K12Cal has verified 2026-27 dates. Other districts stay in the directory with the official website from the NCES file.
The table scrolls sideways on small screens.
| District | City | Enrollment | Official website |
|---|---|---|---|
| Chicago Public Schools Dist 299 | Chicago | 322,809 | Chicago Public Schools Dist 299 website |
| CUSD 300 | Algonquin | 20,488 | CUSD 300 website |
| CUSD 308 | Oswego | 16,851 | CUSD 308 website |
| Indian Prairie CUSD 204 calendar | Aurora | 25,950 | Indian Prairie CUSD 204 website |
| Naperville CUSD 203 calendar | Naperville | 16,071 | Naperville CUSD 203 website |
| Plainfield SD 202 | Plainfield | 24,683 | Plainfield SD 202 website |
| Rockford SD 205 | Rockford | 27,661 | Rockford SD 205 website |
| Schaumburg CCSD 54 | Schaumburg | 15,074 | Schaumburg CCSD 54 website |
| SD U-46 | Elgin | 34,553 | SD U-46 website |
| Valley View CUSD 365U | Romeoville | 14,847 | Valley View CUSD 365U website |
Questions
Which Illinois districts have a 2026-27 calendar on K12Cal?
Illinois has 2 published 2026-27 calendars on K12Cal: Indian Prairie CUSD 204 and Naperville CUSD 203.
Where do the Illinois district names on this page come from?
Names, cities, enrollment, and websites come from an NCES directory of the 600 largest U.S. school districts. A 2026-27 calendar link is added only after the dates are checked against a district source. K12Cal does not estimate start dates or breaks.