In this series: Colorado 2025-26 Enrollment.

A year ago, Colorado's enrollment trajectory looked almost reassuring. The state lost just 206 students in 2024-25 — a 0.02% decline, close enough to flat that district CFOs could treat it as a rounding error. Denver was still growing. Front Range suburbs were still building schools. The post-COVID bleed appeared to be slowing to a stop.

Then the Colorado Department of Education released its October 2025-26 pupil membership data, and the floor gave way: 870,793 public school students, down 10,272 from the prior year. That is the largest single-year loss outside of COVID in the 12-year data window — more than triple the prior three years of decline combined. Whatever floor people thought they saw last year was not a floor.

What the numbers open up

The enrollment data covers 186 districts and nearly 1,900 schools, from booming exurban corridors on the Northern Front Range to mountain towns watching their elementary classrooms thin out. Over the coming weeks, The COEdTribune will unpack it in a series of data-driven articles. Here is what jumps out first.

White students dropped below 50% for the first time. In 2024-25, white enrollment slipped to 49.2% of Colorado's total — and fell again to 49.0% in 2025-26. The state lost 60,365 white students over the past decade, a 12.4% decline, while multiracial enrollment surged 41%. Colorado is now a majority-minority state by enrollment.

Eighty-one districts just hit all-time lows. That is 43.5% of the state — including six of the eight largest suburban districts. Jefferson County, the state's second-largest district, has shed 12,521 students in a decade. The decline is no longer confined to rural Colorado.

Three in four districts never recovered from COVID. Only 50 of 186 districts have returned to their pre-pandemic enrollment levels. The 136 that have not are now 72,839 students below their projected trajectories.

By the numbers: 870,793 students statewide in 2025-26 — down 10,272 from the prior year, a 1.2% decline and the lowest total in the 12-year data window.

The threads we are following

The kindergarten pipeline is collapsing. Colorado enrolled 17,500 more 12th graders than kindergartners in 2025-26, a ratio that has flipped completely over the past decade. Kindergarten enrollment is down 13.1% while 12th grade is up 19.1%. The students who will fill middle and high schools for the next decade are simply not there.

Charter growth has stalled. After years of steady expansion, Colorado's charter sector plateaued at 15.7% market share. Growth decelerated to just 0.3 percentage points in 2025-26 — the slowest pace in the data window.

Virtual schools are reshaping the numbers. Nearly 28,000 Colorado students attend schools with no physical buildings, concentrated in a handful of operators like Ed reEnvisioned BOCES, Byers 32J, and GOAL Academy. Their enrollment patterns distort host district statistics in ways that make conventional enrollment analysis misleading.

What comes next

This is the first in a series of articles examining what the 2025-26 enrollment data reveals about Colorado public schools. New articles publish weekly on Fridays.

The enrollment figures come from CDE Pupil Membership Statistics. The data covers headcount enrollment for public school districts statewide.

Detailed code that reproduces the analysis and figures in this article is available exclusively to EdTribune subscribers.