For the 2026 school year, there are 27 public schools serving 9,716 students in Williamson County, IL (there are 4 private schools, serving 579 private students). 94% of all K-12 students in Williamson County, IL are educated in public schools (compared to the IL state average of 88%).
The top-ranked public schools in Williamson County, IL are Washington Elementary School, Longfellow Elementary School and Tri-c Elementary School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Williamson County, IL public schools have an average math proficiency score of 32% (versus the Illinois public school average of 27%), and reading proficiency score of 36% (versus the 30% statewide average). Schools in Williamson County have an average ranking of 10/10, which is in the top 10% of Illinois public schools.
Minority enrollment is 19% of the student body (majority Black), which is less than the Illinois public school average of 55% (majority Hispanic).
Best Public Schools in Williamson County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Washington Elementary School
(Math: 49% | Reading: 51%)
Rank:
Rank:
9/
Top 20%10
420 E Main St
Marion, IL 62959
(618) 993-8534
Marion, IL 62959
(618) 993-8534
Gr: K-5 | 465 students Student-teacher ratio: 13:1 Minority enrollment: 25%
Rank: #22.
Longfellow Elementary School
(Math: 50-54% | Reading: 45-49%)
Rank:
Rank:
9/
Top 20%10
1400 W Hendrickson St
Marion, IL 62959
(618) 993-3230
Marion, IL 62959
(618) 993-3230
Gr: K-5 | 261 students Student-teacher ratio: 13:1 Minority enrollment: 29%
Rank: #33.
Tri-c Elementary School
(Math: 45-49% | Reading: 45-49%)
Rank:
Rank:
9/
Top 20%10
1405 W Grand Ave
Carterville, IL 62918
(618) 985-8742
Carterville, IL 62918
(618) 985-8742
Gr: K-3 | 650 students Student-teacher ratio: 14:1 Minority enrollment: 18%
Rank: #44.
Carterville Jr High School
(Math: 42% | Reading: 48%)
Rank:
Rank:
9/
Top 20%10
816 S Division St
Carterville, IL 62918
(618) 985-4500
Carterville, IL 62918
(618) 985-4500
Gr: 7-8 | 344 students Student-teacher ratio: 15:1 Minority enrollment: 21%
Rank: #55.
Adams School
(Math: 35-39% | Reading: 50-54%)
Rank:
Rank:
9/
Top 20%10
15470 Lake Of Egypt Rd
Creal Springs, IL 62922
(618) 996-2181
Creal Springs, IL 62922
(618) 996-2181
Gr: PK-8 | 283 students Student-teacher ratio: 11:1 Minority enrollment: 10%
Rank: #66.
Carterville Intermediate School
(Math: 41% | Reading: 49%)
Rank:
Rank:
9/
Top 20%10
300 School St
Carterville, IL 62918
(618) 985-6411
Carterville, IL 62918
(618) 985-6411
Gr: 4-6 | 500 students Student-teacher ratio: 14:1 Minority enrollment: 18%
Rank: #77.
Carterville High School
(Math: 30-34% | Reading: 45-49%)
Rank:
Rank:
8/
Top 30%10
1415 W Grand Ave
Carterville, IL 62918
(618) 985-2940
Carterville, IL 62918
(618) 985-2940
Gr: 9-12 | 668 students Student-teacher ratio: 17:1 Minority enrollment: 20%
Rank: #88.
Jefferson Elementary School
(Math: 40-44% | Reading: 35-39%)
Rank:
Rank:
8/
Top 30%10
700 E Boulevard St
Marion, IL 62959
(618) 997-5766
Marion, IL 62959
(618) 997-5766
Gr: PK-5 | 376 students Student-teacher ratio: 13:1 Minority enrollment: 23%
Rank: #99.
Lincoln Elementary School
(Math: 38% | Reading: 39%)
Rank:
Rank:
8/
Top 30%10
400 Morningside Dr
Marion, IL 62959
(618) 997-6063
Marion, IL 62959
(618) 997-6063
Gr: K-5 | 482 students Student-teacher ratio: 13:1 Minority enrollment: 33%
Rank: #1010.
Herrin C U S D 4 Elementary School
(Math: 39% | Reading: 36%)
Rank:
Rank:
8/
Top 30%10
5200 Herrin Rd
Herrin, IL 62948
(618) 942-2744
Herrin, IL 62948
(618) 942-2744
Gr: 2-5 | 712 students Student-teacher ratio: 14:1 Minority enrollment: 22%
Rank: #1111.
Herrin Middle School
(Math: 28% | Reading: 33%)
Rank:
Rank:
7/
Top 50%10
700 S 14th St
Herrin, IL 62948
(618) 942-7461
Herrin, IL 62948
(618) 942-7461
Gr: 6-8 | 513 students Student-teacher ratio: 13:1 Minority enrollment: 22%
Rank: #1212.
Marion Jr High School
(Math: 27% | Reading: 29%)
Rank:
Rank:
7/
Top 50%10
1609 W Main St
Marion, IL 62959
(618) 997-1317
Marion, IL 62959
(618) 997-1317
Gr: 6-8 | 742 students Student-teacher ratio: 15:1 Minority enrollment: 27%
Rank: #1313.
Crab Orchard Elementary School
(Math: 23% | Reading: 31%)
Rank:
Rank:
6/
Top 50%10
19189 Bailey St
Marion, IL 62959
(618) 982-2181
Marion, IL 62959
(618) 982-2181
Gr: PK-8 | 323 students Student-teacher ratio: 15:1 Minority enrollment: 2%
Rank: #1414.
Herrin High School
(Math: 15-19% | Reading: 25-29%)
Rank:
Rank:
5/
Bottom 50%10
700 N 10th St
Herrin, IL 62948
(618) 942-6606
Herrin, IL 62948
(618) 942-6606
Gr: 9-12 | 662 students Student-teacher ratio: 13:1 Minority enrollment: 16%
Rank: #1515.
Project Echo
Alternative School
(Math: ≤20% | Reading: ≤20% )
Rank:
Rank:
5/
Bottom 50%10
17428 Route 37
Johnston City, IL 62951
(618) 983-6628
Johnston City, IL 62951
(618) 983-6628
Gr: 7-12
Rank: #1616.
Johnston City High School
(Math: 15-19% | Reading: 20-24%)
Rank:
Rank:
5/
Bottom 50%10
1500 Jefferson Ave
Johnston City, IL 62951
(618) 983-4700
Johnston City, IL 62951
(618) 983-4700
Gr: 9-12 | 328 students Student-teacher ratio: 12:1 Minority enrollment: 11%
Rank: #1717.
Lincoln Elementary School
(Math: 25-29% | Reading: 10-14%)
Rank:
Rank:
5/
Bottom 50%10
20163 Corinth Rd
Pittsburg, IL 62974
(618) 982-2130
Pittsburg, IL 62974
(618) 982-2130
Gr: 3-4 | 163 students Student-teacher ratio: 12:1 Minority enrollment: 10%
Rank: #1818.
Marion High School
(Math: 11% | Reading: 30%)
Rank:
Rank:
4/
Bottom 50%10
1501 S Carbon St
Marion, IL 62959
(618) 993-8196
Marion, IL 62959
(618) 993-8196
Gr: 9-12 | 1,075 student Student-teacher ratio: 15:1 Minority enrollment: 24%
Rank: #1919.
Crab Orchard High School
(Math: ≤20% | Reading: 11-19%)
Rank:
Rank:
4/
Bottom 50%10
19189 Bailey St
Marion, IL 62959
(618) 982-2181
Marion, IL 62959
(618) 982-2181
Gr: 9-12 | 154 students Student-teacher ratio: 13:1 Minority enrollment: 4%
Rank: #2020.
Jefferson Elementary School
(Math: 40-44% | Reading: 45-49% )
Rank:
Rank:
3/
Bottom 50%10
1108 Grand Ave
Johnston City, IL 62951
(618) 983-7561
Johnston City, IL 62951
(618) 983-7561
Gr: PK-2 | 270 students Student-teacher ratio: 14:1 Minority enrollment: 8%
Rank: #2121.
Washington Middle School
(Math: 11% | Reading: 17%)
Rank:
Rank:
3/
Bottom 50%10
100 E 12th St
Johnston City, IL 62951
(618) 983-7581
Johnston City, IL 62951
(618) 983-7581
Gr: 5-8 | 296 students Student-teacher ratio: 12:1 Minority enrollment: 12%
Rank: n/an/a
601 N 17th St
Herrin, IL 62948
(618) 942-5418
Herrin, IL 62948
(618) 942-5418
Gr: PK-1 | 433 students Student-teacher ratio: 12:1 Minority enrollment: 23%
Rank: n/an/a
Roe 21 Senior's Plus Alop
Alternative School
502 W Jackson St
Marion, IL 62959
(618) 998-1283
Marion, IL 62959
(618) 998-1283
Gr: 10-12
Rank: n/an/a
Starquest Academy Rssp South
Alternative School
502 W Jackson St
Marion, IL 62959
(618) 998-1283
Marion, IL 62959
(618) 998-1283
Gr: 6-12
Rank: n/an/a
Williamson Co Intensive Program
Special Education School
801 E Reeves St
Marion, IL 62959
(618) 997-2472
Marion, IL 62959
(618) 997-2472
Rank: n/an/a
Williamson Co Learning Center
Special Education School
409 S Court St
Marion, IL 62959
(618) 993-2138
Marion, IL 62959
(618) 993-2138
Frequently Asked Questions
What are the top-ranked public schools in Williamson County, IL?
The top-ranked public schools in Williamson County, IL include Washington Elementary School, Longfellow Elementary School and Tri-c Elementary School.
How many public schools are located in Williamson County?
24 public schools are located in Williamson County.
What percentage of students in Williamson County go to public school?
94% of all K-12 students in Williamson County are educated in public schools (compared to the IL state average of 88%).
What is the racial composition of students in Williamson County?
Williamson County public schools minority enrollment is 19% of the student body (majority Black), which is less than the Illinois public schools average of 55% (majority Hispanic).
Which public schools in Williamson County are often viewed compared to one another?
Popular comparisons of public schools in Williamson County include: Lincoln Elementary School vs. Lincoln Elementary School, Herrin High School vs. Carterville High School, Lincoln Elementary School vs. Lincoln Elementary School
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