📊 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 10 Rated Districts in Sangamon County, IL
Sorted by rating, then state percentile
| County Rank | District | District Office | Rating | State Percentile |
|---|---|---|---|---|
| #1 | Williamsville Community Unit School District 15 | Williamsville | 9/10 Excellent | 88th |
| #2 | New Berlin CUSD 16 | New Berlin | 8/10 Good | 76th |
| #3 | Pleasant Plains Community Unit School District 8 | Pleasant Plains | 8/10 Good | 75th |
| #4 | Tri-City Community Unit School District 1 | Buffalo | 8/10 Good | 73rd |
| #5 | Ball-Chatham Community Unit School District 5 | Chatham | 7/10 Good | 68th |
| #6 | Rochester Community Unit School District 3A | Rochester | 6/10 Average | 52nd |
| #7 | Auburn Community Unit School District 10 | Auburn | 5/10 Average | 42nd |
| #8 | Pawnee Community Unit School District 11 | Pawnee | 5/10 Average | 40th |
| #9 | Riverton Community Unit School District 14 | Riverton | 4/10 Below Average | 30th |
| #10 | Springfield School District 186 | Springfield | 3/10 Below Average | 20th |
Best School Districts in Sangamon County, Illinois (2026)
This page lists the 10 public school districts headquartered in Sangamon 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 Sangamon 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 Sangamon County, Illinois? ▼
Among the 10 rated districts in Sangamon County, Illinois, the highest-rated is Williamsville Community Unit School District 15 (Williamsville), rated 9/10 (Excellent) and in the 88th 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.