| District | City | Rating | Students | Schools | Grades | Zip Codes |
|---|---|---|---|---|---|---|
| Somonauk Community Unit School District 432 | Somonauk | 8/10 Good · 75th pct | 750 | 3 | PK–12 | 1 |
| Sandwich Community Unit School District 430 | Sandwich | 7/10 Good · 64th pct | 1,895 | 6 | PK–12 | 1 |
| Hinckley-Big Rock Community Unit School District 429 | Hinckley | 6/10 Average · 57th pct | 696 | 3 | PK–12 | 1 |
| Sycamore Community Unit School District 427 | Clare | 6/10 Average · 56th pct | 3,598 | 7 | PK–12 | 2 |
| Indian Creek Community Unit District 425 | Shabbona | 5/10 Average · 47th pct | 711 | 3 | PK–12 | 2 |
| Genoa-Kingston Community Unit School District 424 | Genoa | 5/10 Average · 40th pct | 1,544 | 4 | PK–12 | 2 |
| Hiawatha Community Unit School District 426 | Kirkland | 4/10 Below Average · 39th pct | 420 | 2 | PK–12 | 1 |
| DeKalb Community Unit School District 428 | Cortland | 1/10 Poor · 8th pct | 6,840 | 12 | PK–12 | 3 |
How DeKalb County compares
Together they enroll 16,454 students across 40 schools. The largest is DeKalb Community Unit School District 428 with 6,840 students. Districts here average 5.2/10, below the Illinois average of 5.6/10. Ratings range from 1/10 to 8/10.
School Districts in DeKalb County, Illinois
DeKalb County has 8 public school districts covering 13 zip codes. The top-rated district in DeKalb County is Somonauk Community Unit School District 432 (8/10). Ratings are based on the share of students proficient in reading and math on state assessments (IAR 2023–24), ranked against all districts in Illinois. Directory details come from NCES CCD 2024–25.
Enter your zip code on any page to confirm your exact district assignment — district boundaries are address-specific and may not follow county or city lines.
Frequently Asked Questions
How many school districts are in DeKalb County, IL?
8 school districts serve zip codes in DeKalb County, IL. This page lists each one with its rating, enrollment, grade span and the zip codes it covers.
What is the best-rated school district in DeKalb County, IL?
Of the districts serving DeKalb County, Somonauk Community Unit School District 432 has the highest rating on this site at 8/10. That places it in the 75th percentile among Illinois school districts.
How are these school district ratings calculated?
Each rating is the share of students scoring proficient or above on Illinois reading and math assessments, ranked against other districts in Illinois and converted to a 1–10 scale. Percentiles compare districts within Illinois only, never across state lines.