Where Have All the Children Gone? The Demographic Crisis Behind TUSD's Declining Enrollment
Falling Birth Rates, an Aging Population, Shifting Families, and School Choice Are Reshaping Public Education in Tucson
John C. Blackshire, Jr., The Accountware Group | October 2026
Tucson Unified School District (TUSD) is confronting a long-term enrollment problem that cannot be explained entirely by school choice, educational performance, or management decisions.
Something more fundamental is happening in Tucson.
The number of school-age children living within TUSD's boundaries is declining. Birth rates have fallen, the population is aging, and families with children are increasingly distributed across other parts of metropolitan Tucson.
These demographic changes have major consequences for public education.
School districts were built to serve populations that existed decades ago. Buildings were constructed, attendance boundaries established, transportation systems designed, and staffing structures developed around the expectation that substantial numbers of children would continue living in surrounding neighborhoods.
But what happens when those children are no longer there?
TUSD's financial problems are partly the result of operating a school system designed for a much larger student population than the one currently available to attend its schools.
Understanding this problem requires examining the demographics of Tucson and Pima County, not simply the number of students transferring to charter or private schools.
1. The Number of School-Age Children Within TUSD Is Declining
One of the most revealing statistics came from TUSD Superintendent Dr. Gabriel Trujillo during the District's 2026 school-reconfiguration discussions.
According to public reporting, approximately 56,000 school-age children lived within TUSD's general enrollment boundaries five years ago.
Today, that number is approximately 52,500.
School-age population within TUSD boundaries | Approximate count |
Five years ago | 56,000 |
2026 | 52,500 |
Decline | 3,500 |
Percentage decline | 6.25% |
This represents a reduction of approximately 3,500 potential students before considering which schools their families choose.
These figures are particularly important because they describe the population of children residing within the District, not merely enrollment in TUSD-operated schools.
A district cannot enroll children who do not live within its boundaries unless it attracts them from elsewhere through open enrollment.
Even if TUSD improved its academic performance, expanded popular programs, and attracted a larger share of local families, it would still face the demographic reality of fewer school-age children living within its traditional service area.
This is a structural problem.
Source: Arizona Public Media, September 2, 2026, reporting on TUSD's school-reconfiguration discussions.
2. Declining Birth Rates Are Reducing the Number of Future Students
Birth rates are one of the most important leading indicators for school enrollment.
A child born today may enter kindergarten approximately five years from now. Consequently, the number of births occurring in a school district's geographic area provides useful information about future kindergarten enrollment.
When births decline over an extended period, fewer children eventually reach school age.
Arizona Department of Health Services historical vital-statistics reports document birth and fertility trends by county.
The broader demographic pattern has been one of declining fertility, including a substantial reduction in teen birth rates.
For example, the University of Arizona's MAP Dashboard reports that the Tucson metropolitan area's teen birth rate declined from 54 births per 1,000 females ages 15–19 in 2006 to 14.1 in 2024.
That is a decline of approximately 74%.
The teen birth rate is only one component of overall fertility and should not be mistaken for the total birth rate. Nevertheless, it illustrates how dramatically childbearing patterns have changed.
For school planning, the more important measurements are total annual births, age-specific fertility rates, and the number of births within TUSD's attendance boundaries.
These statistics should be part of TUSD's enrollment-forecasting system.
If fewer children are being born in neighborhoods served by TUSD, the District should expect smaller entering kindergarten classes several years later unless migration offsets the decline.
3. Tucson's Population Is Aging
A second major demographic development is the aging of the Tucson metropolitan population.
According to the U.S. Census Bureau's population estimates, approximately 24.4% of Pima County residents were age 65 or older in 2025.
Only approximately 18.8% were younger than 18.
That means Pima County has a larger proportion of older residents than children.
This is a significant demographic characteristic for a school district.
Older households generally have fewer school-age children living at home. Neighborhoods originally developed for young families can gradually become communities dominated by empty-nest households, retirees, and older adults.
Homes may remain occupied, but the number of children attending neighborhood schools declines.
This creates a situation in which a neighborhood can appear stable while its elementary school experiences significant enrollment losses.
The District's east side is particularly relevant. Public reporting on TUSD's school-reconfiguration process has identified aging neighborhoods as a factor in declining enrollment and earlier school closures in that area.
TUSD should therefore analyze demographic change at the neighborhood and school-attendance-area level rather than relying exclusively on countywide statistics.
A neighborhood can maintain its population while losing much of its school-age population.
4. Tucson's Population Is Not Simply Declining
It is important to distinguish between total population and school-age population.
The U.S. Census Bureau estimates that Pima County had approximately 1.075 million residents in July 2025, compared with approximately 1.043 million at the 2020 Census.
That represents population growth of approximately 3%.
Therefore, it would be misleading to claim that TUSD's enrollment losses are simply the result of a declining Pima County population.
The more important issue is population composition and geographic distribution.
The region can gain residents while losing children in certain neighborhoods.
Population growth driven by retirees, smaller households, or adults without school-age children does not necessarily increase public-school enrollment.
Likewise, new housing developments outside TUSD's boundaries may attract families who previously lived within the District.
For TUSD, the relevant population measure is not how many people live in metropolitan Tucson. It is how many school-age children live within the District's boundaries and how that number is changing.
5. Families With Children Are Moving to Other Parts of Metropolitan Tucson
Metropolitan Tucson has experienced residential development in communities outside TUSD's traditional boundaries.
Areas such as Vail, Marana, and Sahuarita have attracted families through new housing, suburban development, and different residential opportunities.
When families with children move from established Tucson neighborhoods into these communities, the children may leave TUSD's potential enrollment population entirely.
This differs from losing a student to a charter school within the same neighborhood.
In the first case, the child has moved outside the District's geographic market.
In the second case, the child remains geographically available to TUSD, but the family has selected another educational provider.
These two problems require different management responses.
TUSD cannot solve the first problem merely through advertising or improved school programs.
The District must adjust its long-term facilities and staffing structure to reflect the geographic redistribution of families.
However, improved educational offerings, strong school performance, and attractive specialized programs may help TUSD retain families who would otherwise consider relocating.
6. School Choice Is Reducing TUSD's Share of the Remaining Students
Demographic decline does not explain all of TUSD's enrollment losses.
TUSD also competes with charter schools, private schools, homeschooling, and educational programs funded through Arizona's Empowerment Scholarship Account program.
This creates an important distinction:
The available student population is declining, and TUSD is competing for a smaller share of that population.
In September 2026, Arizona Public Media reported that approximately 39,000 students attended TUSD schools during the previous school year.
The report also cited declining birth rates, charter-school enrollment, and the ESA program as contributing factors in TUSD's enrollment challenges.
The Superintendent has discussed the substantial number of children residing within TUSD's boundaries who attend schools outside the District.
However, these students should not automatically be counted as recoverable TUSD enrollment.
Some families may have longstanding preferences for charter, private, or home education.
Others may have selected alternatives because of specific programs, location, transportation, academic performance, or school climate.
TUSD needs to distinguish between families who are unlikely to return and those who might choose District schools if meaningful improvements were made.
This is both a demographic and a competitive issue.
7. TUSD's Historical School System Was Designed for a Different Population
TUSD's enrollment peaked decades ago.
Arizona Public Media reported that approximately 63,000 students attended TUSD schools at the District's 1973 enrollment peak.
Today, TUSD serves approximately 39,000 students.
That represents a decline of approximately 24,000 students, or roughly 38%, from the historical peak.
Yet much of the District's school infrastructure was developed during periods when enrollment was substantially higher.
TUSD's 2026 school-reconfiguration materials identify approximately 88 schools and overall building utilization of about 58%.
The District has also identified approximately 28,000 excess student seats.
This mismatch has financial consequences.
Buildings require maintenance, utilities, security, custodial services, repairs, administrative support, and capital investment whether they operate at full capacity or half capacity.
Operating underutilized schools can divert resources from instructional programs and student services.
But closing schools also involves significant educational and community considerations.
The challenge is to determine which facilities, programs, and geographic locations best serve the District's current and projected student population.
TUSD needs a school system designed for the demographic realities of the 2030s, not the enrollment patterns of the 1970s.
8. Declining Enrollment Is Now a Significant Financial Risk
The Arizona Auditor General's January 2026 financial-risk analysis identified TUSD as among the highest-risk school districts in Arizona.
One of the factors was the District's continuing decline in Weighted Student Count.
The historical figures show:
Fiscal Year | Weighted Student Count |
FY2022 | 47,085 |
FY2023 | 46,299 |
FY2024 | 45,205 |
FY2025 | 44,486 |
FY2026 | 42,851 |
FY2027 preliminary | 40,538 |
Between FY2022 and FY2026, WSC declined approximately 9%.
The preliminary FY2027 figure indicates another 5.4% annual reduction.
These are not necessarily the same numbers as individual students enrolled because Arizona's weighted funding calculations reflect student characteristics and funding weights.
Nevertheless, the decline directly affects TUSD's funding environment.
The FY2026 Annual Financial Report shows an M&O fund deficit of approximately $8.3 million.
The District also reported an approximately $17.1 million shortfall between M&O revenues and expenditures before transfers.
Declining enrollment is not the only cause of these financial problems, but it is an important contributing factor.
As student counts fall, the District must adjust recurring expenditures to reflect the revenue available to support them.
9. TUSD Needs to Forecast Births and School-Age Population, Not Just Enrollment
One of the most important management improvements TUSD could make is developing a long-term demographic forecasting model.
A traditional enrollment forecast may begin with current enrollment and project changes based on historical trends.
That is useful, but it is not sufficient.
TUSD should also analyze:
Annual births within District boundaries and surrounding neighborhoods.
Kindergarten entry rates compared with births five years earlier.
Population by age group within each school-attendance area.
Household turnover and migration of families with children.
New residential development and housing affordability.
Charter-school, private-school, and ESA participation.
Student transfers into and out of the District.
Grade-to-grade student retention.
Neighborhood-level school capture rates.
The result should be a five- to ten-year projection of the potential student population, followed by an estimate of the share TUSD can reasonably expect to enroll.
This would allow management to distinguish demographic losses from competitive enrollment losses.
For example, if an attendance area loses 15% of its school-age children but the local TUSD school maintains its share of those children, the problem is primarily demographic.
If the school-age population remains stable while TUSD enrollment falls substantially, the District should investigate education program quality, accessibility, and other competitive factors.
Those situations require different solutions.
10. TUSD Should Use Demographic Forecasts to Guide School Reconfiguration
The District's current school-reconfiguration process should be based on more than today's enrollment and building-utilization figures.
A school that is underutilized today may remain underutilized for the next decade if births continue declining and its surrounding population continues aging.
Conversely, a school located near areas attracting younger families may have stronger future enrollment prospects.
The Governing Board should receive a demographic projection for every school-attendance area showing expected school-age population and projected enrollment through at least FY2031, preferably FY2036.
Those projections should then be combined with academic achievement, transportation, facility condition, program availability, and financial information.
The objective should not simply be to close buildings.
It should be to develop a sustainable network of schools capable of delivering strong educational outcomes to the students who are likely to live within TUSD's boundaries.
Conclusion: TUSD Cannot Reverse Demographic Change, but It Can Respond to It
TUSD's enrollment crisis has several causes.
Declining birth rates reduce the number of children entering the school system.
An aging population changes the composition of neighborhoods.
Residential development outside TUSD's boundaries attracts families to other school districts.
Charter schools, private schools, and ESA-supported educational alternatives compete for the remaining students.
And the District's own academic performance, programs, accessibility, and reputation may influence family choices.
These forces should not be confused with one another.
The demographic evidence does not support a simple claim that Tucson's entire population is shrinking. Rather, it shows that the population available to attend TUSD schools is changing in ways that are unfavorable to the District's traditional operating model.
Management cannot control birth rates, aging, or regional housing development.
It can, however, control how effectively TUSD forecasts these changes, adjusts its operating structure, improves its educational offerings, and competes for families who remain within its boundaries.
The critical question for the TUSD Governing Board is no longer whether enrollment will return to the levels that supported the District's historical school infrastructure. It is whether management is planning realistically for the smaller and changing student population the District is likely to serve.
TUSD's financial sustainability and educational quality will depend in part on how effectively it answers that question.
Sources
U.S. Census Bureau, QuickFacts: Pima County, Arizona. https://www.census.gov/quickfacts/fact/table/pimacountyarizona/AGE775223
Arizona Department of Health Services, Vital Statistics Trends in Arizona — Births. https://pub.azdhs.gov/health-stats/menu/info/trend/index.php?pg=births
University of Arizona MAP Dashboard, Teen Birth Rate in Tucson. https://mapazdashboard.arizona.edu/health-social-well-being/teen-birth-rate
Arizona Auditor General, Tucson Unified School District Financial Risk Analysis. https://frisk.azauditor.gov/District/Tucson_Unified_School_District
Arizona Public Media, September 2, 2026, Tucson Unified Seeks Community Input Ahead of Decisions on School Consolidations and Closures.
Arizona Public Media, September 26, 2026, Tucson School Closures: Takeaways from Engagement Meetings and What's Ahead for TUSD.
TUSD, FY2026 Annual Financial Report and Reimagining TUSD school-reconfiguration materials.
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