Listed below are counties with the largest average student size (2026).
The county with largest average public school student size is Oneida County, ID with 1,451 students. The county with smallest average public school student size is Golden Valley County, MT with 23 students.
Student Size Range: 175
751
Avg. Student Size: 511
Largest Public School Student Size By County (2026)
County
Average School Size
Largest Schools (# of Students)
Rank: #11.
1,451 students
Rank: #22.
1,264 students
Rank: #33.
1,251 students
Rank: #44.
1,125 students
Rank: #55.
1,113 students
Rank: #66.
1,107 students
Rank: #77.
1,104 students
Rank: #8-98-9.
1,071 students
Rank: #8-98-9.
1,071 students
Rank: #1010.
1,054 students
Rank: #1111.
1,050 students
Rank: #1212.
1,038 students
Rank: #1313.
1,037 students
Rank: #1414.
1,016 students
Rank: #1515.
986 students
Rank: #1616.
985 students
Rank: #1717.
979 students
Rank: #1818.
978 students
Rank: #1919.
963 students
Frequently Asked Questions
What counties have the public schools with the largest student size?
The counties with the largest student size are Oneida County, ID (1,451 students average student size), Forsyth County, GA (1,264 students average student size) and Gwinnett County, GA (1,251 students average student size).
Recent Articles
When “Free Public School” Still Isn’t Free
Discover the hidden costs of public school in 2026, from supplies and fees to transportation, technology, and extracurricular expenses.
What a District Budget Cut Means for Your Child's School Experience
Learn how district budget cuts can affect class sizes, programs, staffing, transportation, and your child's daily school experience in 2026.
School Closure Risk: What Parents Should Check Before Moving
Learn how parents can assess school closure risk before buying or renting in a district, using enrollment, funding, and boundary data.