📊 What this ranking measures
Rankings are based on academic achievement — the share of students scoring proficient or above on state reading and math assessments (IAR 2023–24), ranked against other districts in the same state — not on spending, district size, or staffing. See full methodology →
All 8 Rated Districts in DeKalb County, IL
Sorted by rating, then state percentile
| County Rank | District | District Office | Rating | State Percentile |
|---|---|---|---|---|
| #1 | Somonauk Community Unit School District 432 | Somonauk | 8/10 Good | 75th |
| #2 | Sandwich Community Unit School District 430 | Sandwich | 7/10 Good | 64th |
| #3 | Hinckley-Big Rock Community Unit School District 429 | Hinckley | 6/10 Average | 57th |
| #4 | Sycamore Community Unit School District 427 | Sycamore | 6/10 Average | 56th |
| #5 | Indian Creek Community Unit District 425 | Shabbona | 5/10 Average | 47th |
| #6 | Genoa-Kingston Community Unit School District 424 | Genoa | 5/10 Average | 40th |
| #7 | Hiawatha Community Unit School District 426 | Kirkland | 4/10 Below Average | 39th |
| #8 | DeKalb Community Unit School District 428 | Dekalb | 1/10 Poor | 8th |
Best School Districts in DeKalb County, Illinois (2026)
This page lists the 8 public school districts headquartered in DeKalb County, Illinois that have a SchoolDistrictFinder rating, scored using IAR 2023–24 state assessment data. The county rank is simply their order here; the state percentile compares each district with every rated district in Illinois, which is how the 1–10 rating is set. Ratings are not comparable with districts in other states.
Districts are placed in the county of their NCES directory listing. A district's boundaries can cross county lines, and a home in DeKalb County may be served by a district headquartered next door — search your address or zip code to confirm.
Frequently Asked Questions
What is the best-rated school district in DeKalb County, Illinois? ▼
Among the 8 rated districts in DeKalb County, Illinois, the highest-rated is Somonauk Community Unit School District 432 (Somonauk), rated 8/10 (Good) and in the 75th percentile of Illinois districts on IAR 2023–24 reading and math proficiency.
How are these rankings calculated? ▼
Each district's rating comes from the share of its students scoring proficient or above on state reading and math assessments (IAR 2023–24), percentile-ranked against all rated districts in Illinois and converted to a 1–10 scale. Full methodology here.