For the 2026 school year, there are 2 public high schools serving 857 students in Mercer County, IL.
The top-ranked public high schools in Mercer County, IL are Sherrard High School and Mercer County High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Mercer County, IL public high schools have an average math proficiency score of 17% (versus the Illinois public high school average of 26%), and reading proficiency score of 24% (versus the 29% statewide average). High schools in Mercer County have an average ranking of 5/10, which is in the bottom 50% of Illinois public high schools.
Mercer County, IL public high school have a Graduation Rate of 87%, which is equal to the Illinois average of 87%.
The school with highest graduation rate is Sherrard High School, with 90-94% graduation rate. Read more about public school graduation rate statistics in Illinois or national school graduation rate statistics.
Minority enrollment is 11% of the student body (majority Hispanic), which is less than the Illinois public high school average of 55% (majority Hispanic).
Best Public High Schools in Mercer County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Sherrard High School
(Math: 15-19% | Reading: 25-29%)
Rank:
Rank:
5/
Bottom 50%10
4701 176th Ave
Sherrard, IL 61281
(309) 593-2175
Sherrard, IL 61281
(309) 593-2175
Gr: 9-12 | 449 students Student-teacher ratio: 13:1 Minority enrollment: 13%
Rank: #22.
Mercer County High School
(Math: 15-19% | Reading: 20-24%)
Rank:
Rank:
5/
Bottom 50%10
1500 S College Ave
Aledo, IL 61231
(309) 582-2223
Aledo, IL 61231
(309) 582-2223
Gr: 9-12 | 411 students Student-teacher ratio: 13:1 Minority enrollment: 7%
Frequently Asked Questions
What are the top-ranked public high schools in Mercer County, IL?
The top-ranked public high schools in Mercer County, IL include Sherrard High School and Mercer County High School.
How many public high schools are located in Mercer County?
2 public high schools are located in Mercer County.
What is the racial composition of students in Mercer County?
Mercer County public high schools minority enrollment is 11% of the student body (majority Hispanic), which is less than the Illinois public high schools average of 55% (majority Hispanic).
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