The Largest Public Elementary Schools in America

If you picture the biggest elementary school in America, you probably imagine an enormous K-5 building somewhere in a dense suburb. That's not what the data shows. The largest schools that report an elementary grade range are almost all K-8 academies and charter schools, and a handful of districts run deliberately giant grade-banded buildings that hold thousands of children in just three or four grades. Before anyone reads a ranking like this and worries that their kindergartner is about to join 3,000 five-year-olds, it's worth being honest about what these numbers actually measure.

Here's the short version. A school counted as "elementary" in federal data is one whose grade span starts at prekindergarten or kindergarten. That span can stop at grade 5, but it can just as easily run through grade 8. A K-8 school carries nine grade levels under one roof instead of six, so its total head count is naturally far larger than a neighborhood K-5. Layer charter schools on top of that, which often span PK-8 by design and recruit across a whole metro rather than a single attendance zone, and you get the buildings below.

The 13 Largest Public Elementary Schools by Enrollment

The ranking below uses NCES Common Core of Data enrollment for school year 2024-25. The grade span is listed for each school, because that's the single most important piece of context for reading the number next to it.

1. Chester Community Charter · 3,782 · K-8. A charter in Chester, Pennsylvania, and the largest school on this list by a wide margin. It spreads its enrollment across multiple campuses under one charter, which is part of how a single "school" record gets this big.
2. Mason Intermediate Elementary · 3,086 · grades 3-6. In Mason, Ohio, and a different animal entirely. Mason doesn't run small neighborhood schools. It runs one huge building per grade band, so this single school holds nearly every third through sixth grader in the district.
3. American Academy · 2,803 · PK-8. A charter network campus in Castle Pines, Colorado, in the fast-growing Denver exurbs south of the metro.
4. Aventura Waterways K-8 Center · 2,063 · PK-8. A district K-8 center in Miami, Florida. The "K-8 Center" label is common across Miami-Dade, and it explains a lot of the Florida presence on this list.
5. Pembroke Pines Charter Elementary · 2,046 · K-5. The first genuinely K-5 school in the ranking, in Pembroke Pines, Florida. It's a charter, and a rare example of a traditional elementary grade span reaching this size.
6. Grenada Elementary · 2,044 · PK-5. In Grenada, Mississippi. Like the Mason buildings, this is a district that consolidates a grade band into one large school rather than scattering it across several smaller ones.
7. Trinity Basin Preparatory · 2,020 · PK-8. A charter operating in Fort Worth, Texas, with the PK-8 span that recurs throughout this ranking.
8. Mason Early Childhood Center · 1,997 · PK-2. The second Mason, Ohio building on the list. Between this PK-2 center and the grades 3-6 intermediate school above, Mason has two of the country's largest elementary-range buildings in one district.
9. Mill Creek Academy · 1,983 · K-8. A district K-8 school in St. Augustine, Florida, part of St. Johns County's distinctive approach to growth.
10. Pine Island Academy · 1,972 · K-8. Also serving the St. Augustine area in St. Johns County, and another purpose-built K-8 academy.
11. Freedom Crossing Academy · 1,964 · K-8. A K-8 academy in St. Johns, Florida, in the same St. Johns County system that keeps appearing here.
12. Keys Gate Charter · 1,950 · K-8. A charter in Homestead, Florida, at the southern edge of the Miami metro.
13. Starkey Ranch K-8 · 1,927 · PK-8. A district K-8 school in Odessa, Florida, in the booming Tampa-area suburbs.

Data note: enrollment figures come from NCES Common Core of Data, SY 2024-25. This count deliberately includes K-8 centers, which is why these schools dwarf traditional K-5 elementaries. A school is treated as "elementary" when its grade span begins at prekindergarten or kindergarten, regardless of whether it stops at grade 5 or runs through grade 8.

Florida Wrote the Playbook for Giant K-8 Academies

Seven of the thirteen schools above are in Florida, and that isn't an accident of one fast-growing town. It's a model. As subdivisions go up in counties like St. Johns south of Jacksonville and across the Miami and Tampa metros, districts increasingly build a single large K-8 academy to anchor a new community rather than separate elementary and middle schools. Mill Creek, Pine Island, and Freedom Crossing are all St. Johns County academies. Aventura Waterways and Keys Gate sit in the Miami metro. Starkey Ranch grew up alongside a master-planned development outside Tampa.

The K-8 structure does real work for these districts. It lets a school open with a full grade range on day one, keeps siblings on the same campus, and smooths the transition that usually happens at the jump to middle school. For families moving into a new Odessa or St. Augustine subdivision, the neighborhood school and the K-8 academy are often the same building. That's how you end up with elementary-range schools approaching 2,000 students.

Charters Keep Showing Up, and Here's Why

Chester Community Charter, American Academy, Trinity Basin Preparatory, Pembroke Pines Charter, and Keys Gate Charter are all charter schools, which means five of the thirteen largest fall outside the traditional district model. Charters tend toward large enrollments for structural reasons. They frequently span PK-8 rather than a single grade band, they draw students from across an entire metro instead of one attendance zone, and a single charter can operate several campuses that report under one school record. Chester Community Charter is the clearest example: its 3,782 students are spread across multiple buildings under one charter, which is how it ends up roughly 700 students ahead of anything else in the country.

Mason, Ohio Runs a Strategy All Its Own

Two schools on this list belong to one Ohio district, and the reason is a deliberate organizational choice that almost no one else makes at this scale. Mason splits roughly 17,000 K-12 students into a small number of enormous single-grade-band buildings. The Early Childhood Center handles PK-2. The Intermediate school handles grades 3-6. Each one therefore holds nearly every child in the district at that age, which is exactly why both crack 1,990 students despite covering only three or four grades apiece.

It's the opposite of the Florida approach. Florida builds wide K-8 academies that hold many grades for one neighborhood. Mason builds narrow grade-band campuses that hold a few grades for the entire district. Both strategies produce schools that look enormous in national enrollment data, and both are easy to misread if you assume "elementary school" means a K-5 building of a few hundred kids.

What This Means for the Average Family

For context, a typical US public elementary school enrolls about 470 students. Every school on this list runs four to eight times that size, which is precisely what makes them national outliers rather than a sign of where elementary education is heading. The overwhelming majority of American elementary schools are still modest neighborhood K-5 buildings, and nothing in this ranking changes that.

If you're a parent looking at a large K-8 academy or a single big grade-band school in your district, the size itself isn't a verdict on quality. Big buildings can run small, well-staffed grade-level teams that feel intimate from a child's seat. What's worth asking about specifically is the student-to-teacher ratio, how the school groups kids within a grade, and how it handles the social transition from the elementary grades into the middle grades that a K-8 keeps under one roof. Pull the enrollment and ratio figures for your own schools, compare a few nearby options, and weigh size against everything else rather than treating it as a headline.

For the upper end of the same phenomenon, the largest public high schools in America follow a similar logic: the giants are concentrated in fast-growing Sun Belt districts and a handful of consolidated systems, for many of the same structural reasons you see here.

Sources
National Center for Education Statistics: Common Core of Data (CCD)
National Center for Education Statistics: Public School Enrollment (Condition of Education)