In a state where 126 of 184 districts lost students over the past decade, Weld RE-4ET in Windsor has grown every single year since 2015. Eleven consecutive years. No other Colorado district with data across the full window can say the same.

The district enrolled 5,102 students in 2014-15. By 2025-26, that number had reached 8,883, a gain of 3,781 students, or 74.1%. During that same period, Colorado's statewide enrollment fell 2.0%, from 888,790 to 870,793.

Eleven for eleven

The streak is notable not for its size but for its persistence. Windsor added students in years when the state added students, and in years when the state lost them. The COVID year of 2020-21, when Colorado shed 29,762 students in a single year, Windsor still gained 164. The 2025-26 cliff year, when Colorado dropped 10,272, Windsor added 150.

The annual gains have varied. The largest came in 2021-22 (+627), when post-pandemic housing construction caught up with demand. The smallest was 2022-23 (+124), a year when supply chain delays slowed new home completions along the I-25 corridor. But every bar on the chart points the same direction: up.

The pattern tracks two distinct growth phases. From 2015 to 2020, Windsor averaged 442 students per year, fueled by new subdivisions in the RainDance and Peakview neighborhoods. Since 2021, the pace has decelerated to an average of 262 per year. The houses are still being built, but lot sizes are smaller, and the families moving in are trending smaller as well.

Why Windsor keeps growing

The most direct driver is residential construction. Windsor sits at the intersection of I-25 and U.S. 34, roughly equidistant between Fort Collins and Greeley, in Weld County. The town's population surged 23.3% between 2020 and 2023, the fastest growth rate among Colorado communities with 20,000 or more residents.

Weld County itself added 9,529 residents in a single year (July 2023 to July 2024), more than any other Colorado county, growing at 2.6% annually. The county's appeal is straightforward: lower housing costs than Boulder, Fort Collins, or metro Denver, combined with proximity to jobs in agriculture, energy, manufacturing, and aerospace.

That population pressure has run headlong into school capacity. By 2024, Weld RE-4's elementary schools were operating at 102% to 130% of building capacity, not counting modular classrooms. The district's middle school exceeded its 700-student design by more than 100. Voters responded in November 2022 by approving a $271 million bond, funding two new elementary schools (Hollister Lake and Orchard Hill, each designed for 600 students), a new middle school, and expansions at Severance High School.

"Elementary schools in the school district range from 102% to 130% core building capacity, which does not include modular classrooms." -- Greeley Tribune, April 2024

An alternative explanation for part of the growth is open enrollment. Colorado allows cross-district transfers, and Windsor's school ratings and newer facilities may draw students from neighboring districts. The data does not distinguish between families who moved to Windsor and families who transferred in from Greeley or Johnstown. Both likely contribute.

Greeley-Evans School District 6 helped quantify the open-enrollment side of that picture. In 2025-26, 1,233 students from outside District 6 boundaries enrolled in D6 through Choice Enrollment, according to the district's superintendent's office. Of those, 813 students live within the Weld RE-4 boundary. In the other direction, 162 students who live inside D6 boundaries open-enrolled to Weld RE-4. That is a net flow of 651 students out of Weld RE-4's geographic boundary into District 6 schools, not the direction one might expect given the Windsor growth story.

The distinction matters because it suggests Windsor's enrollment boom is primarily residential, not policy-driven. "Most of Greeley's recent growth has come on the west side of town outside of District 6's boundaries," a District 6 representative said, noting that the Greeley city line is split between D6 and Weld RE-4. District 6, by contrast, is "fairly land-locked and built out" within its boundary, with "very little acreage within the District 6 boundary of Greeley for single-home development." That is the structural mirror image of Windsor's situation.

The corridor context

Windsor is not growing in isolation. It sits in the northern Front Range growth corridor, a band of communities along I-25 between Denver and Fort Collins where housing construction has outpaced the rest of the state for a decade.

School District 27JET in Brighton, 40 miles south, grew 42.0% over the same period (17,103 to 24,290). Johnstown-Milliken RE-5JET, Windsor's immediate neighbor to the south, grew 12.7%. Greeley 6ET, the largest district in Weld County, grew 7.5%.

But no other corridor district matched Windsor's consistency. District 27J's growth came in bursts, including a single-year gain of 2,349 in 2022-23, followed by years of much smaller gains. Poudre R-1ET in Fort Collins is essentially flat over the period, gaining just 88 students total (0.3%). Even within a booming region, Windsor stands apart.

A diversifying student body

Windsor's growth has not been demographically uniform. White enrollment rose from 4,484 to 6,453 (+43.9%), but Hispanic enrollment more than doubled, from 792 to 1,860 (+134.8%). Multiracial students grew from 140 to 337 (+140.7%).

The result: white students' share of enrollment dropped from 81.2% in 2016 to 72.6% in 2026, while Hispanic share rose from 14.3% to 20.9%. Windsor remains substantially whiter than Colorado as a whole (49.0% white statewide), but the gap is narrowing. One in five Windsor students is now Hispanic, up from roughly one in seven a decade ago.

This shift reflects the demographics of who is moving to Weld County. The county's growth is split roughly evenly between natural increase (births) and migration, with international migration accounting for a substantial share of new arrivals.

How Windsor ranks

Among Colorado districts with at least 500 students in 2016, Windsor's 60.8% growth rate over the past decade ranks sixth. But the districts above it on the list tell a different story. Education reEnvisioned BOCES (+463.8%) and Byers 32J (+150.1%) are virtual school operators whose growth reflects online enrollment, not families moving into a community. Las Animas RE-1 (+69.0%) and Bennett 29J (+68.1%) started from small bases where a handful of new housing developments can produce large percentage swings.

Windsor's combination of sustained growth, moderate size, and brick-and-mortar infrastructure needs makes it a genuine planning challenge. Virtual schools that grow by 400% do not need to build buildings. A district that grew from 5,100 to 8,900 does, and Windsor has spent $271 million to prove it.

What to watch

Windsor's growth rate has decelerated from 8.4% in 2022 to 1.7% in 2026. The annual gain of 150 students in 2025-26 was the second-smallest in the streak, above only the +124 posted in 2022-23 when supply chain delays slowed home completions. Whether the streak extends to 12 depends largely on whether the northern Front Range housing pipeline continues to deliver family-sized homes or shifts toward smaller units and multifamily construction.

The broader question is what Windsor's streak means for Colorado's funding formula. Per-pupil funding follows students. When enrollment falls statewide but rises in Windsor, the state does not get smaller checks. Windsor does get bigger ones. The $271 million bond was necessary precisely because the formula delivers operating revenue but not capital. A district that adds 3,781 students in 11 years needs classrooms that per-pupil funding was never designed to build.

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