Bonneville Joint District - EdTribune ID - Idaho Education Data

Idaho Is 17,871 Students Below Its Growth Curve

Fri, 20 Mar 2026 12:00:00 GMT

For 17 years, Idaho's public schools grew like clockwork. From 2002 to 2019, the state added an average of 3,522 students every year, a pace so steady that a simple line drawn through the data explained 98.6% of the variation. The state's enrollment rose from 246,184 to 307,228, a 24.8% gain that tracked Idaho's reputation as one of America's fastest-growing states.

If that line had continued, Idaho would have enrolled 331,968 students in 2025-26. Instead, 314,097 showed up. The gap between where Idaho was headed and where it landed is 17,871 students, and it has grown every single year since the pandemic.

Three years, twelve times the speed

The raw totals obscure how quickly this shift happened. Idaho peaked at 318,979 students in 2022-23 and has declined every year since. But the pace of loss has accelerated sharply: 319 students in 2023-24, 593 in 2024-25, then 3,970 in 2025-26, a loss nearly seven times larger than the year before and triple the COVID-year dip of 1,338.

In 2025-26, 125 of 190 districts lost students. Only 60 gained.

The gap from projection tells the structural story. In 2020-21, the first full pandemic school year, Idaho was 3,707 students below its trend line. That deficit partially closed in 2021-22 and 2022-23 as students returned. But starting in 2023-24, the gap began to widen again, from 2,424 to 6,265 to 10,379 to 17,871. The trajectory is not recovering. It is diverging.

The population paradox

Idaho's population surpassed two million in 2024 and continues to grow at 1.5% annually, seventh-fastest in the nation. Between 2020 and 2024, 74% of that growth came through domestic migration. The state is getting bigger. Its schools are getting smaller.

The explanation lies in who is moving to Idaho. According to Idaho Department of Labor data, youth (19 and under) contributed just 9.3% of the state's population growth between 2020 and 2024, the smallest share of any age group. Seniors grew 17.4% over the same period. Ada County, home to Boise, actually lost 891 youth during those four years even as the county's total population surged.

The Boise School District has pointed to rising housing prices, gentrification, and the fact that the district is "attracting older adults, i.e., retired individuals" rather than families. Boise Independent^↗ enrolled 26,321 students in 2002, its highest mark in the dataset. By 2026, that number had fallen to 21,717, a loss of 4,604 students over 24 years. The district has declined every year since 2020-21, six consecutive years.

Rising housing costs are a direct mechanism. Since 2020, Ada and Canyon counties have gained new residents and lost public school students at a rate of nearly 14 to one.

Big districts bleed, small ones grow

The losses are not evenly distributed. Idaho's seven largest districts (those enrolling 10,000 or more students in 2019) collectively lost 9,124 students between 2019 and 2026, a 7.3% decline. Only one of the seven, Bonneville Joint^↗, grew. West Ada^↗, the state's largest district, lost 1,588 students. Nampa^↗ lost 1,504. Coeur d'Alene^↗ lost 1,208.

Meanwhile, districts enrolling fewer than 500 students collectively grew 7.4%. Small districts (500 to 2,000) grew 5.3%. The pattern is a near-perfect inversion: the bigger the district, the worse the decline.

Only 46.3% of districts that existed in both 2019 and 2026 have recovered to their pre-pandemic enrollment levels. Among large districts, the recovery rate is 14.3%, meaning six of seven are smaller than they were before COVID.

Vallivue School District^↗ is an outlier. Located in Caldwell, in Canyon County, Vallivue grew from 9,090 to 10,700 students since 2019, a 17.7% gain, making it one of the few mid-size districts still expanding.

The kindergarten signal

Kindergarten enrollment offers a forward-looking indicator, and in Idaho, it points down. The state enrolled 20,184 kindergartners in 2025-26, down 6.1% from 21,487 in 2018-19 and well below the 2012-13 peak of 22,537. At the other end of the pipeline, 12th grade enrollment reached 25,316, up 15.9% from 2019. Idaho's schools are graduating large cohorts built during the growth era while receiving smaller ones shaped by declining birth rates and housing affordability.

The K-to-12th-grade spread has implications for where the gap goes next. Each year's graduating class is roughly 5,000 students larger than the incoming kindergarten class. Unless kindergarten cohorts reverse course, the structural arithmetic favors continued decline.

The funding squeeze

Idaho funds schools through an attendance-based formula that distributes resources by "support units," a calculation tied to average daily attendance rather than enrollment. That formula amplifies the enrollment decline: when students leave, dollars follow, and districts that fall below attendance thresholds lose funding faster than they can cut costs.

The Idaho School Boards Association warned that the shift back to attendance-based funding after pandemic-era enrollment-based formulas could cost districts $162 million statewide:

"We knew and made our best attempts to warn state leaders that shifting back to attendance would bring a dramatic drop in how state funding is distributed." — Quinn Perry, Idaho School Boards Association, Idaho Education News

The 2025-26 enrollment decline alone reduced state funding by approximately $24 million. Bonneville Joint District Superintendent Scott Woolstenhulme told Idaho Education News in February 2026 that his district faces a $5 to $6 million shortfall: "We are cutting our budget. I think that's probably true of almost every district in the state."

Nampa closed four elementary schools in the summer of 2024. Administrators in Coeur d'Alene, Middleton, Kellogg, and Grangeville have all reported weighing budget cuts. Idaho ranks last in the nation for cost-adjusted per-pupil funding, leaving districts with little cushion when enrollment drops.

$170 million in ghost students

The 17,871-student gap is not abstract. At roughly $9,500 per student in state and local funding, it represents approximately $170 million that Idaho's funding formula was built to distribute but never will. That money was supposed to pay for teachers, bus routes, and building maintenance in a growing state. The growth stopped. The buildings remain.

Idaho does not officially track private school or homeschool enrollment. An estimated 18,000 students attend private schools, and a $50 million tax credit program now subsidizes their families' costs. Without data on how many new credits go to students leaving public schools versus those already outside, the competitive pressure remains unmeasured.

Bonneville Joint's superintendent told Idaho Education News in February that his district faces a $5 to $6 million shortfall. "We are cutting our budget," Scott Woolstenhulme said. "I think that's probably true of almost every district in the state." Sixty-one districts have now declined three consecutive years. Idaho ranks last in cost-adjusted per-pupil funding. The gap between the schools Idaho built and the schools Idaho needs widens by another 3,500 students each year.

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

Bonneville Joint Grew 78% in 24 Years, Then Stopped

Fri, 27 Feb 2026 12:00:00 GMT

Bonneville Joint District^↗ has 13,511 students. It is Idaho's third-largest district, behind only West Ada and Boise. Twenty-four years ago, it was seventh, with 7,568 students, sitting behind both Idaho Falls^↗ and Pocatello^↗ in eastern Idaho's enrollment hierarchy. It passed Idaho Falls in 2012 and Pocatello in 2018, by a margin of just 31 students.

The 78.5% growth rate over 24 years nearly triples the state's 27.6% gain over the same period. But the streak ended in 2024. Bonneville peaked at 13,801 in 2023 and has declined for three consecutive years, losing 290 students. The question is whether this is a pause or a turning point.

An 18-year run

From 2003 through 2020, Bonneville Joint grew every single year. The 18-year consecutive growth streak is the second-longest among Idaho districts over the period, tied with West Ada and Vallivue and trailing only Jefferson County (19 years).

The growth came in waves. From 2002 to 2010, the district added 2,320 students (+30.7%), fueled by Idaho's pre-recession housing boom and Ammon's emergence as a bedroom community for Idaho Falls. From 2010 to 2020, another 3,437 students arrived (+34.8%), accelerating even through years when the state's growth moderated. The single largest annual gain was 721 students in 2015, a 6.5% jump over the prior year.

The district's share of Idaho's total enrollment climbed steadily: 3.1% in 2002 to 4.3% in 2026. Bonneville Joint grew faster than the state in almost every year of the streak.

The engine: Ammon and INL

Bonneville Joint District covers the communities south and east of Idaho Falls, including Ammon. Census estimates place Ammon's 2024 population at about 20,100, up from 6,187 in 2000. That 225% population increase over 24 years made it one of the fastest-growing small cities in the Mountain West.

The Idaho National Laboratory, located about 50 miles west of Idaho Falls, generates over $4 billion in annual economic impact and is one of the region's largest employers. Federal investment in nuclear research and clean energy has expanded INL's workforce over the past decade, drawing engineers and scientists with school-age children to the Idaho Falls metro area. The Idaho Falls MSA's population reached 171,233 in 2024, growing at 1.6% annually.

Proximity to BYU-Idaho in Rexburg also shapes the district's enrollment indirectly. BYU-Idaho enrolled 24,111 campus students in fall 2024, its largest incoming class ever. Many graduates settle in the Idaho Falls area, and the region's LDS population tends to have above-average family sizes, which sustained school enrollment even as birth rates fell elsewhere.

Eastern Idaho's hierarchy, rewritten

Bonneville Joint's rise reshuffled the region's enrollment rankings. In 2002, Pocatello (12,210) and Idaho Falls (10,648) were eastern Idaho's dominant districts, with Bonneville a clear third at 7,568. By 2026, the order has fully inverted: Bonneville leads at 13,511, Pocatello has dropped to 11,437 (-6.3% since 2002), and Idaho Falls has fallen to 9,751 (-8.4%).

The gap between Bonneville and Idaho Falls is now 3,760 students. In 2011, the year before the crossover, Bonneville trailed by just 14.

Among all Idaho districts currently enrolling more than 5,000 students, Bonneville's 78.5% growth ranks third behind Vallivue (+175.2%) and Kuna (+81.4%). Both of those are Boise-area suburbs that roughly doubled or tripled off smaller bases. Bonneville is the only district east of the Sawtooths in the top five.

Three red bars

The 2024-2026 period introduced something Bonneville had rarely experienced: consecutive decline. The district lost 138 students in 2024, 59 in 2025, and 93 in 2026. The total three-year decline of 290 students (-2.1% from peak) is mild compared to Boise's 4,604-student loss (-17.5% since 2002), but the pattern is new.

The most likely driver is the same force hitting districts statewide: fewer kindergarteners. Bonneville's kindergarten class peaked at 996 in 2013 and has not recovered. In 2026, the district enrolled 824 kindergarteners, a 17.3% decline from that peak.

Eastern Idaho's birth rate decline is steeper than the rest of the state. Idaho's overall birth rate fell 29% between 2007 and 2021, but eastern Idaho's dropped 31%, the largest regional decline. The children born during the 2007 peak are now in high school. The children born in the subsequent trough are the ones entering kindergarten.

A pipeline that tells two stories

Bonneville's grade-level data reveals a district that is simultaneously growing at the top and shrinking at the bottom. Grade 12 enrollment nearly doubled from 614 in 2002 to 1,161 in 2026, an 89.1% increase. Kindergarten grew only 44.1% over the same span, from 572 to 824.

The gap matters because today's kindergarten class becomes tomorrow's 12th-grade class. If incoming cohorts remain near 824 while graduating classes are 1,161, the district will lose roughly 300 students per cycle just from pipeline compression, even without any outmigration.

The district has been planning for continued growth. In August 2023, voters approved a $34.5 million bond to build a new 700-student elementary school near Iona. The rationale was that existing schools were at or over capacity, with several relying on portable classrooms. Whether a district that is now losing students will fill a new elementary school is an open question. It may simply relieve overcrowding at existing buildings rather than absorb new growth.

A new school for a shrinking pipeline

In August 2023, Bonneville voters approved a $34.5 million bond to build a 700-student elementary school near Iona. The rationale was that existing schools were at or over capacity, with several relying on portable classrooms. The bond passed during the district's peak year. Three consecutive declines later, the school is under construction for a district that is losing students.

It may simply relieve overcrowding at existing buildings rather than absorb new growth. The 824 kindergarteners entering in 2025-26 is the district's smallest class since 2008. INL's expansion and Ammon's housing pipeline provide structural support that Boise and Pocatello lack. But 78.5% growth over 24 years was built on a birth rate that has fallen 31% in eastern Idaho. The new elementary school will open into that arithmetic.

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

Boise Has Lost 4,458 Students in Nine Years

Fri, 02 Jan 2026 12:00:00 GMT

In 2002, Boise Independent District^↗ was Idaho's largest school system. It enrolled 26,321 students, 1,260 more than its suburban neighbor to the west. Twenty-four years later, Boise enrolls 21,717, a loss of 4,604 students, 17.5% of its peak enrollment. West Ada District^↗, that former runner-up, now serves 37,919 students and leads by 16,202.

The numbers would be bad enough if Boise were shrinking alongside the state. It is not. Idaho added 15,332 students statewide between 2017 and 2026, a 5.1% gain. Boise shed 4,458 during the same window. The district has posted a loss every single year since 2018, nine consecutive years of decline with no year of reprieve.

A district that peaked twice and still couldn't hold

Boise's enrollment history reads as two declines separated by a false recovery. From 2002 to 2007, the district dropped from 26,321 to 24,900, losing 1,421 students as early suburban growth pulled families into Meridian and Eagle. A decade-long recovery followed, clawing back 1,275 students by 2017 to reach 26,175, still 146 below the 2002 mark.

Then the second decline began, and it has been far steeper.

The pre-COVID losses were modest: 127 students in 2018, 521 in 2019, 43 in 2020. The pandemic year of 2021 was catastrophic, erasing 1,630 students in a single year, a 6.4% drop. But the five years since have been collectively worse. From 2022 through 2026, Boise lost another 2,137 students, an average of 427 per year, nearly double the pre-COVID pace of 230 per year.

The 2026 loss of 513 students, 2.3% of enrollment, was the second-largest year-over-year drop outside the pandemic. The district is not stabilizing. It is losing ground faster than it did before COVID.

Where the students aren't

The grade-level data makes the pipeline problem visible. Since 2017, kindergarten enrollment in Boise has fallen from 1,700 to 1,269, a 25.4% decline. First grade is down 27.1%. Second grade is down 27.7%. The losses weaken steadily by grade: 23.1% in third, 17.4% in fifth, 13.1% in ninth, and just 1.4% in twelfth.

Pre-kindergarten is the sole growth spot, up 20.4%, though from a small base of 318 to 383. The district has expanded early childhood programs and full-day kindergarten to attract families earlier. The pipeline data suggests this will not offset the structural decline: the kindergarten classes entering now are 25% smaller than those a decade ago.

The suburban inversion

In 2002, Boise enrolled 1,260 more students than West Ada. By 2003, West Ada had already passed it. The gap has widened every decade since.

West Ada's growth has stalled in recent years, falling from a peak of 40,326 in 2020 to 37,919 in 2026. But the comparison with Boise is instructive: West Ada lost 2,407 students from its peak and remains 12,858 above its 2002 level. Boise lost 4,604 from its peak and sits 4,604 below where it started.

The pattern extends beyond West Ada. Vallivue School District^↗, serving the fast-growing Caldwell-area suburbs in Canyon County, grew 26.7% from 2017 to 2026, adding 2,254 students to reach 10,700. Bonneville Joint District^↗ in eastern Idaho grew 10.5%. Meanwhile, Nampa School District^↗, an older urban core like Boise, lost 13.0%, and Boise's 17.0% loss is the steepest among Idaho's large districts.

A shrinking share of a growing state

Idaho's total K-12 enrollment grew 27.6% from 2002 to 2026, from 246,184 to 314,097. Boise's share of that total fell from 10.69% to 6.91%.

The shrinkage is relentless. Boise's share has fallen in 22 of the last 24 years. It dropped below 9% in 2011, below 8% in 2020, and below 7% in 2025. A district that once enrolled more than one in 10 Idaho students now enrolls fewer than one in 14.

Housing, births, and retirees

Three forces converge on Boise's enrollment.

The most direct is housing costs. Boise's median home price reached approximately $480,000 by early 2025, pricing out many young families. The district itself has acknowledged that gentrification and rising home prices are pushing families into more affordable areas in Canyon County and beyond.

"We're seeing this in places like Denver and Salt Lake City -- these Western cities where there's a bunch of growth, but it's not in the typical boundaries of the big city. It's in the suburbs." -- Terry Ryan, Bluum CEO, Idaho EdNews, June 2023

The second force is demographic. Idaho's birth rate fell 29% between 2007 and 2021, from 16.6 to 11.8 births per 1,000 population. Smaller birth cohorts are now flowing through the K-12 pipeline. Boise's kindergarten class has shrunk from 1,931 in 2014 to 1,269 in 2026, a 34.3% decline that tracks closely with the birth-rate curve lagged by five years.

The third force is the composition of Idaho's population boom. Despite being one of the fastest-growing states in the nation, 90% of Idaho's population growth from 2019 to 2022 came from adults over 18. The new residents are disproportionately retirees without school-age children, which means population growth and enrollment growth have decoupled.

"The main source of population growth in Idaho is going to be new residents moving into the state." -- Boise State Public Radio, July 2025

For Boise specifically, the alternatives include both suburban traditional districts and a charter sector that grew from 4.5% of statewide enrollment in 2017 to 7.3% in 2026. How much of Boise's loss flows to charters versus suburban migration is not captured in the enrollment data.

Budget math and 27 fewer positions

In Idaho, per-pupil funding follows students. Every student who leaves takes state dollars with them. The district cut 27 full-time positions in 2023, nine elementary teachers, 17 secondary teachers, and one assistant principal, to align staffing with declining headcount. The district's average daily attendance fell to its lowest level since 1983-1984.

The fiscal pressure is not unique to Boise. Eight of Idaho's 10 largest school districts lost enrollment in 2025-2026. But Boise's losses are the largest in absolute terms and the steepest in percentage terms among major districts, meaning its budget adjustments must be proportionally deeper.

Approaching 20,000

Boise enrolled 1,945 twelfth-graders in 2026 and 1,269 kindergartners. Each year, roughly 700 more students graduate out than enter at the bottom. At the current pace, the district will fall below 20,000 students within three years.

Twenty-seven positions are already gone. Average daily attendance has not been this low since Ronald Reagan's first term. The district that defined Idaho public education for decades now manages a building portfolio designed for 26,000 students with fewer than 22,000 inside them.

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