| District | City | Rating | Students | Schools | Grades | Zip Codes |
|---|---|---|---|---|---|---|
| Carterville Community Unit School District 5 | Cambria | 10/10 Excellent · 90th pct | 2,218 | 4 | K–12 | 2 |
| Marion Community Unit School District 2 | Creal Springs | 8/10 Good · 71st pct | 3,749 | 7 | PK–12 | 2 |
| Herrin Community Unit School District 4 | Freeman Spur | 7/10 Good · 66th pct | 2,355 | 4 | PK–12 | 5 |
| Crab Orchard Community Unit School District 3 | Marion | 7/10 Good · 61st pct | 488 | 2 | PK–12 | 0 |
| Johnston City Community Unit School District 1 | Johnston City | 3/10 Below Average · 21st pct | 1,094 | 4 | PK–12 | 2 |
How Williamson County compares
Together they enroll 9,904 students across 21 schools. The largest is Marion Community Unit School District 2 with 3,749 students. Districts here average 7.0/10, above the Illinois average of 5.6/10. Ratings range from 3/10 to 10/10.
School Districts in Williamson County, Illinois
Williamson County has 5 public school districts covering 11 zip codes. The top-rated district in Williamson County is Carterville Community Unit School District 5 (10/10). 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 Williamson County, IL?
5 school districts serve zip codes in Williamson 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 Williamson County, IL?
Of the districts serving Williamson County, Carterville Community Unit School District 5 has the highest rating on this site at 10/10. That places it in the 90th 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.