The fastest-growing large school district in the country sits in the cornfields-turned-cul-de-sacs north of Dallas. Prosper ISD enrolled 12,133 students in the 2017-18 school year. Seven years later it enrolled 31,651. That is a 160.9% jump, roughly a tripling, in a district that was already large to begin with.
We pulled enrollment from the National Center for Education Statistics (NCES) for the 2017-18 and 2024-25 school years, kept every district that had at least 10,000 students at the start, and ranked them by percentage growth. The result is a tight, repetitive list. Twelve of the top 14 are in Texas. Most of the rest are Sun Belt and Mountain West districts on the edge of a growing metro. Almost none of them are growing for a reason that generalizes to the country as a whole.
That last point matters, so start with it. National public school enrollment has not grown. It was flat before the pandemic, dropped sharply in 2020, and has not clawed back to where it was. When a district gains 19,000 students in seven years, those students are not new to the planet. They are families who moved, usually from a more expensive or slower-growing part of the country, into a place building houses fast enough to hold them. Growth here is mostly a migration story wearing an enrollment costume.
That framing changes how you should read the percentages. A district cannot grow 160% by convincing existing families to have more children, and it cannot do it by luring students from the district next door, because the district next door usually is not shrinking by a matching amount. It grows by importing households from the national pool of people who are moving. For every fast-growing district on this list, there is a slower-growing or shrinking one somewhere else, often in the Northeast or the industrial Midwest, that those families left. The 14 districts below are the visible winners of a reshuffling, not evidence that the school-age population is expanding.
| District | State | 2017-18 | 2024-25 | % change |
|---|---|---|---|---|
| Prosper ISD | TX | 12,133 | 31,651 | +160.9% |
| IDEA Public Schools | TX | 35,595 | 79,430 | +123.1% |
| Forney ISD | TX | 10,196 | 18,565 | +82.1% |
| YES Prep Public Schools | TX | 10,895 | 19,573 | +79.7% |
| Lamar CISD | TX | 32,146 | 46,786 | +45.5% |
| Tomball ISD | TX | 15,933 | 22,913 | +43.8% |
| Northwest ISD | TX | 23,141 | 32,098 | +38.7% |
| Uplift Education | TX | 17,291 | 23,384 | +35.2% |
| School District 27J | CO | 17,908 | 24,044 | +34.3% |
| Waukee Community School District | IA | 10,415 | 13,917 | +33.6% |
| Nebo District | UT | 33,534 | 43,696 | +30.3% |
| St. Johns County | FL | 40,189 | 52,322 | +30.2% |
| Comal ISD | TX | 23,105 | 29,839 | +29.1% |
| New Caney ISD | TX | 15,046 | 19,420 | +29.1% |
Districts with at least 10,000 students in 2017-18, ranked by percentage change. Source: allk12 analysis of NCES enrollment, school years 2017-18 and 2024-25.
The Texas Exurb Belt
Draw a ring around Dallas-Fort Worth, Houston, San Antonio, and Austin, then look at the outer edge of that ring. That is where most of this list lives. Prosper and Forney and Northwest ISD sit on the Dallas-Fort Worth fringe. Lamar CISD, Tomball ISD, and New Caney ISD ring Houston. Comal ISD straddles the corridor between San Antonio and Austin.
These are the districts where the metro runs out of built-up land and hits farmland with cheap acreage and a willing county. Developers put up thousands of rooftops, the rooftops fill with young families, and the district that happened to draw the school-attendance boundary finds itself building an elementary school every year or two. Prosper, Forney, and New Caney all more than followed that script. A district does not grow 80% or 160% because birthrates ticked up. It grows because the subdivision two exits down opened 900 new homes.
Lamar CISD added roughly 14,600 students, more than the entire enrollment of many mid-size districts, and it still only ranks fifth here by percentage. The raw numbers under these growth rates are large because the starting enrollments were already large.
Growth like this is expensive and slow to manage even when it is good news. A district that adds a couple thousand students a year has to buy land before the subdivision prices it out, pass a bond, design and build the school, hire and house the teachers, then redraw the attendance boundaries so the new building actually fills. Each of those steps runs on its own timeline, and they rarely line up. That is why fast-growing exurbs so often run portable classrooms behind a brand-new school: the enrollment arrives before the concrete does. The districts on this list have been doing that dance for the better part of a decade.
Three Entries Are Charter Networks, Not Towns
IDEA Public Schools, YES Prep Public Schools, and Uplift Education are not single geographic districts. They are statewide charter networks. Each one operates many campuses spread across different Texas cities, and the federal data rolls all of those campuses up under one district identifier.
That is why IDEA sits at the top of the list by raw growth. It went from 35,595 students to 79,430, an increase of nearly 43,835, by opening new campuses rather than by any one town filling up. YES Prep, concentrated in Houston, and Uplift, concentrated in Dallas-Fort Worth, grew the same way. If you picture these as a single fast-growing suburb, you will misjudge what is happening. They grew by network expansion, campus by campus, which is a different mechanism from a subdivision boom even when the enrollment line on the chart looks identical.
None of this makes the growth less real. It does mean the three networks belong in their own bucket. A charter network can add a campus in a city that is not itself growing. An exurban district can only grow as fast as the homebuilders around it.
Beyond Texas: The Sun Belt and Mountain West
Four districts on the list are not in Texas, and they tell the same migration story in different states. St. Johns County, just south of Jacksonville in Florida, is the largest of them at 52,322 students, up 30.2%. It has spent years as one of the fastest-growing and highest-rated districts in its state, which is exactly the combination that pulls families in: strong test results plus room to build.
School District 27J covers Brighton and the northeast edge of the Denver metro in Colorado, and grew 34.3%. Nebo District south of Provo in Utah added about 10,000 students in a state with a young population and steady in-migration. Waukee Community School District, on the growing western side of Des Moines in Iowa, is the one Midwestern entry, and it grew 33.6% for the same suburban-edge reason the Texas districts did.
The through-line is geography, not curriculum. Every district here sits on the expanding rim of a metro that people are moving toward, in a state that lets housing get built. Nothing on this list is a struggling urban core, and nothing is a rural county holding steady. Growth clusters where new houses go up.
What This List Actually Tells You
Read against the national picture, the takeaway is less about these 14 districts than about everyone else. Most of the country's districts are flat or shrinking. A district that grows this fast is not a sign that public school enrollment is booming. It is a sign that a specific place is on the receiving end of moves out of other places.
If you are a parent looking at one of these districts, the practical read is straightforward. Fast growth means new buildings and, often, redrawn attendance boundaries, portable classrooms during the catch-up years, and bond measures on the ballot. Those are the growing pains of a district adding a school a year, and they are worth asking about before you buy near the edge of a boundary that may move. If you want to see how enrollment is trending where you live, our enrollment on the rise report breaks the same data down state by state.
Sources
allk12 analysis of National Center for Education Statistics (NCES) enrollment data, school years 2017-18 and 2024-25.
NCES, Common Core of Data
