In 2022-23, 7,525,941 children ages 3 to 21 were served under the Individuals with Disabilities Education Act, 15.2% of all US public school students, nearly double the 8.3% share of 1976-77 (NCES, Digest of Education Statistics Table 204.70 and 204.30). Every one of them has an IEP, and the odds of getting one depend heavily on where a child lives and who they are: Pennsylvania served 21.1% of its students, Hawaii 11.7%; boys were identified at 18.3% versus 10.3% for girls; and the number of students served for autism rose 22% in three years. A February 2026 Congressional Research Service report puts the 2023-24 total at approximately 7.9 million. For the funding and staffing side of the same system, see our broader special education statistics. We aggregated data from the National Center for Education Statistics, the Centers for Disease Control and Prevention, the Government Accountability Office, Pew Research Center, the Congressional Research Service, the ECTA Center, CADRE and the other primary sources listed in the methodology.
TL;DR
- 7,525,941 students ages 3 to 21 (15.2% of enrollment) were served under IDEA in 2022-23 (NCES, Digest Table 204.70).
- About 7.9 million children were served in 2023-24 (Congressional Research Service, R44624, 2026).
- The share served has risen from 8.3% in 1976-77 to 15.2% (NCES, Digest Table 204.30).
- Specific learning disabilities account for 32.0% of students served (NCES, Digest Table 204.30).
- Students served for autism rose from 803,000 to 980,000 between 2019-20 and 2022-23 (NCES, Digest Table 204.30).
- Pennsylvania serves 21.1% of students under IDEA, Hawaii 11.7% (NCES, Digest Table 204.70, 2022-23).
- 18.3% of boys vs 10.3% of girls ages 5 to 21 are served (NCES, Digest Table 204.50).
- American Indian or Alaska Native students are identified at 18.9%, Asian students at 7.9% (NCES, Digest Table 204.40).
- 1 in 31 eight-year-olds had autism in 2022, but only 67.3% had documented autism special education eligibility (CDC, ADDM Network, 2025).
- 441,515 infants and toddlers (4.01%) received Part C early intervention in FFY 2023 (ECTA Center, 2024).
- Written state complaints rose 46% from 2024-25 to 2025-26 in 31 surveyed states (CEC and NASDSE via K-12 Dive, 2026).
- Federal Part B funding covered about 10.2% of average per-pupil spending in FY2025, against a 40% promise (CRS, 2026).
1. The National Identification Rate: From 8% to 15% of Students
The headline trend is a near doubling of the share of students with an IEP over five decades, and the pandemic barely dented it. The share of public school students served under IDEA climbed from 8.3% in 1976-77 to 15.2% in 2022-23 (NCES, Digest Table 204.30). The count dipped 1% between 2019-20 and 2020-21, from 7.3 to 7.2 million, then rebounded to a level 3% above 2019-20 by 2022-23 (NCES Fast Facts, Students with disabilities).
The growth is not slowing. The Congressional Research Service, updated in February 2026, states that approximately 7.9 million children ages 3 through 21 received services in 2023-24 (CRS, IDEA Funding: A Primer, R44624). Identification is outpacing enrollment, which means the IEP is no longer a niche document: roughly one in seven public school students now has one.
| Metric | Value | Source |
|---|---|---|
| Students ages 3 to 21 served under IDEA, 2022-23 | 7,525,941 (15.2% of enrollment) | NCES, Digest Table 204.70 |
| Students served, 2023-24 | Approximately 7.9 million | Congressional Research Service, R44624 (February 2026) |
| Students served, 1976-77 | 3,694,000 (8.3% of enrollment) | NCES, Digest Table 204.30 |
| Students served, 2019-20 | 7,282,000 (14.3% of enrollment) | NCES, Digest Table 204.30 |
| Students served, 2012-13 | 6.4 million (13%) | NCES Fast Facts, 2024 |
| Pandemic dip, 2019-20 to 2020-21 | -1% (7.3 to 7.2 million) | NCES Fast Facts, 2024 |
| 2022-23 count vs 2019-20 | 3% higher | NCES Fast Facts, 2024 |
| National share served, 2000 | 13.3% | Houston Chronicle via Education Week, 2016 |
Context note: the 2023-24 CRS figure is rounded and comes from a funding primer rather than a statistical table, so treat the jump from 7.5 to 7.9 million as approximate until NCES publishes the matching Digest table. Pew Research Center’s count for 2021-22 was 7.3 million, 15% of enrollment (Pew Research Center, 2023).
2. What Students Are Identified For: Learning Disabilities Lead, Autism Grows
The mix of disability categories has shifted more than the total. In 1976-77, intellectual disability made up 26.0% of students served and speech or language impairment 35.2%; by 2022-23 those shares were 5.8% and 19.0% (NCES, Digest Table 204.30). The categories that grew are the ones that depend on clinical diagnosis and school evaluation practice: other health impairment, which covers most ADHD cases, went from 141,000 students to 1,150,000.
Autism is the fastest-moving category: 803,000 students in 2019-20 became 980,000 in 2022-23, an increase of 177,000 or 22% (980 / 803 = 1.22) in three years (NCES, Digest Table 204.30). Specific learning disability, the largest category, was flat over the same period (2,405,000 to 2,408,000), and emotional disturbance fell from 365,000 to 327,000. Autism was just 1.5% of students with disabilities in 2000-01 (Pew Research Center, 2023). Our autism prevalence statistics track the clinical side of that curve.
| Metric | Value | Source |
|---|---|---|
| Specific learning disability, 2022-23 | 2,408,000 (32.0% of students served) | NCES, Digest Table 204.30 |
| Speech or language impairment, 2022-23 | 1,430,000 (19.0%), vs 35.2% in 1976-77 | NCES, Digest Table 204.30 |
| Other health impairment, 2022-23 | 1,150,000 (15.3%), vs 141,000 in 1976-77 | NCES, Digest Table 204.30 |
| Autism, 2022-23 | 980,000 (13.0%), vs 803,000 (11.0%) in 2019-20 | NCES, Digest Table 204.30 |
| Autism share of students with disabilities, 2000-01 | 1.5% | Pew Research Center, 2023 |
| Developmental delay, 2022-23 | 518,000 (6.9%) | NCES, Digest Table 204.30 |
| Intellectual disability, 2022-23 | 434,000 (5.8%), vs 961,000 (26.0%) in 1976-77 | NCES, Digest Table 204.30 |
| Emotional disturbance, 2022-23 | 327,000 (4.3%), vs 365,000 in 2019-20 | NCES, Digest Table 204.30 |
Context note: speech and language remains the second-largest category, and 88.5% of those students spend 80% or more of the day in regular classes (NCES, Digest Table 204.60); the clinician side is covered in our speech therapy statistics. Learning disabilities include dyslexia, which many states screen for separately (see our dyslexia statistics).
3. State Variation: Where a Child Lives Changes the Odds
The same child can be in special education in one state and not in the next. Pennsylvania served 21.1% of its public school students under IDEA in 2022-23, while Hawaii served 11.7%, a gap of 9.4 percentage points (NCES, Digest Table 204.70). New York (20.7%), Maine (20.6%) and Massachusetts (19.7%) sit at the top; Idaho (12.1%), Texas (12.7%) and California (13.6%) near the bottom. Puerto Rico is an outlier at 37% (NCES Fast Facts).
The GAO explained why in 2019: IDEA lets states set their own eligibility criteria and define categories, so ‘a child eligible for services in one state might be ineligible in another’. In fall 2016, the share of 6 to 21 year olds served ranged from 6.4% to 15.1% across states (GAO-19-348). Texas shows how policy moves the number. In 2004 the Texas Education Agency set 8.5% as a performance indicator, and districts told reporters it pushed them to keep enrollment at or below that line, even if that meant delaying evaluations; Texas had served 12.1% in 2000 (Education Week, 2016). After the cap was exposed, Texas climbed to 11.7% in 2021-22 (Pew) and 12.7% in 2022-23 (NCES).
| Metric | Value | Source |
|---|---|---|
| Highest state share served, 2022-23 | Pennsylvania 21.1% | NCES, Digest Table 204.70 |
| Lowest state share served, 2022-23 | Hawaii 11.7% | NCES, Digest Table 204.70 |
| New York / Maine / Massachusetts | 20.7% / 20.6% / 19.7% | NCES, Digest Table 204.70 |
| Texas / California / Florida / Idaho | 12.7% / 13.6% / 15.1% / 12.1% | NCES, Digest Table 204.70 |
| Puerto Rico share served, 2022-23 | 37% | NCES Fast Facts, 2024 |
| Largest state change, 2000-01 to 2021-22 | Utah +65%, Rhode Island -22% | Pew Research Center, 2023 |
| State range, ages 6 to 21, fall 2016 | 6.4% to 15.1% | GAO-19-348 (2019) |
| Texas special education benchmark set in 2004 | 8.5% | Houston Chronicle via Education Week, 2016 |
Context note: clinical identification varies too. The CDC’s autism surveillance network found prevalence among 8-year-olds ranging from 9.7 per 1,000 at its Texas (Laredo) site to 53.1 per 1,000 at its California site in 2022, a more than fivefold spread (53.1 / 9.7 = 5.5) (CDC, MMWR Surveillance Summary 74(2), 2025). The GAO data (2016) and Texas benchmark (2004) are older baselines kept for context.
4. Who Gets Identified: Sex and Race
Identification is not evenly distributed, and the gaps are large enough to drive federal oversight. Boys ages 5 to 21 are served under IDEA at 18.3% of enrollment, girls at 10.3% (NCES, Digest Table 204.50), and Pew found boys made up 65% of students with disabilities in 2021-22. Part of the gap mirrors clinical prevalence: the CDC finds autism 3.4 times more common in boys than in girls, and NCHS finds any diagnosed developmental disability at 10.76% of boys versus 5.31% of girls.
By race, American Indian or Alaska Native students (18.9%) and Black students (17.2%) are identified most often, Asian students least (7.9%) (NCES, Digest Table 204.40). The category detail matters more than the total. Black students are identified with intellectual disability at 1.5% of enrollment versus 0.7% for White students, more than double, while autism runs the other way, with Asian students highest at 2.4%. Health survey data show a smaller spread: 9.07% of Black children ages 3 to 17 had a diagnosed developmental disability in 2019-2021 versus 8.42% of White children (NCHS Data Brief 473).
| Metric | Value | Source |
|---|---|---|
| Boys vs girls served, ages 5 to 21, 2022-23 | 18.3% vs 10.3% | NCES, Digest Table 204.50 |
| Male share of students with disabilities, 2021-22 | 65% | Pew Research Center, 2023 |
| Share served by race, 2022-23 | AI/AN 18.9%, Black 17.2%, Two or more 15.9%, White 15.6%, Hispanic 14.7%, Pacific Islander 11.7%, Asian 7.9% | NCES, Digest Table 204.40 |
| Specific learning disability, % of enrollment | AI/AN 7.0%, Black 5.8%, Hispanic 5.5%, White 4.5%, Asian 1.3% | NCES, Digest Table 204.50 |
| Intellectual disability, % of enrollment | Black 1.5%, AI/AN 1.1%, Hispanic 0.9%, White 0.7%, Asian 0.4% | NCES, Digest Table 204.50 |
| Autism, % of enrollment | Asian 2.4%, Black 2.1%, White 1.9%, Hispanic 1.9%, AI/AN 1.6% | NCES, Digest Table 204.50 |
| Diagnosed developmental disability, ages 3 to 17, 2019-2021 | Black 9.07%, White 8.42%, Hispanic 7.40%, Asian 4.85% | NCHS Data Brief 473 |
| Autism prevalence at age 8 by race, 2022 | Asian or Pacific Islander 38.2, Black 36.6, Hispanic 33.0, White 27.7 per 1,000 | CDC, ADDM Network, 2025 |
Context note: school identification rates (NCES) and clinical diagnosis rates (NCHS, CDC) measure different things, so a group can be over-identified in one category and under-identified in another at the same time.
5. Income, 504 Plans, English Learners and Disproportionality Rules
The IEP is not the only route to support, and the choice of route tracks family income. Students near the top of the income scale were nearly twice as likely to have a Section 504 plan as those near the bottom, 2.9% versus 1.5%, according to a January 2026 working paper by Nick Ainsworth and colleagues at UC Irvine that linked Oregon student records from 2008-09 to 2018-19 with IRS tax files (The 74, May 2026). IEPs flip the gradient: one-quarter of the most disadvantaged students had an IEP, more than three times the share of the very wealthiest. A 504 plan brings accommodations such as extra test time without the federal funding or legal machinery of an IEP.
English learners are identified slightly above the overall rate: 832,200 ELs, or 15.8% of all English learners, were students with disabilities in fall 2021, versus 14.7% of all public school students (NCES, English Learners in Public Schools). Federal rules meant to police over-identification have historically been loose. In 2010, only about 2% of districts (356) were required to redirect IDEA funds for significant disproportionality, and 73 of them were in Louisiana alone, because states set their own thresholds: Nebraska required a group to be identified at three times the rate for two consecutive years and flagged zero districts (GAO-13-137).
| Metric | Value | Source |
|---|---|---|
| 504 plan rate, top vs bottom of income scale (Oregon) | 2.9% vs 1.5% | Ainsworth et al., UC Irvine, January 2026, via The 74 |
| IEP rate, most disadvantaged students (Oregon) | One-quarter, more than 3x the wealthiest | Ainsworth et al., UC Irvine, January 2026, via The 74 |
| English learners who are students with disabilities, fall 2021 | 832,200 (15.8% of ELs) | NCES, Condition of Education, 2024 |
| Students with disabilities among all public school students, fall 2021 | 14.7% | NCES, Condition of Education, 2024 |
| Districts flagged for significant disproportionality, 2010 | About 2% (356 districts) | GAO-13-137 (2013) |
| Flagged districts in Louisiana | 73 | GAO-13-137 (2013) |
| Nebraska districts flagged under 3x, 2-year rule, 2010-11 | 0 | GAO-13-137 (2013) |
| IDEA funds districts must reserve for early intervening services when flagged | 15% | GAO-13-137 (2013) |
Context note: the Oregon study covers one state over a decade ending in 2018-19, and The 74 does not specify the exact income cutoffs. The GAO disproportionality data predate the 2016 federal rule that standardized the methodology; most recent available data from GAO is 2013.
6. Early Identification: Part C, Preschool and the Diagnosis Gap
The earliest IEPs start before kindergarten, and early identification is rising fast. 441,515 infants and toddlers, 4.01% of the birth to age 2 population, received IDEA Part C early intervention in FFY 2023, up from 1.77% in FFY 1991 (ECTA Center, Part C national child count). The pandemic hit this age group harder than school-age children: the count fell to 363,387 (3.20%) in FFY 2021. At ages 3 to 5, 527,163 children were served under Part B in 2022-23, about 7% of all students served (527,163 / 7,525,941) (NCES, Digest Table 204.70).
Diagnosis is also moving earlier. Autism prevalence among 4-year-olds reached 29.3 per 1,000 in 2022, and children born in 2018 were 1.7 times as likely to be identified by 48 months as those born in 2014 (CDC, ADDM Network, 2025). But a diagnosis is not an IEP: only 67.3% of 8-year-olds with autism had documented autism special education eligibility. Parent-reported developmental disability among children 3 to 17 rose from 7.40% to 8.56% between 2019 and 2021, driven by other developmental delay (5.08% to 6.06%) (NCHS Data Brief 473).
| Metric | Value | Source |
|---|---|---|
| Part C infants and toddlers served, FFY 2023 | 441,515 (4.01% of population) | ECTA Center, updated September 2024 |
| Part C served, FFY 1991 | 194,363 (1.77%) | ECTA Center, 2024 |
| Part C served, FFY 2021 (pandemic low) | 363,387 (3.20%) | ECTA Center, 2024 |
| Children ages 3 to 5 served under Part B, 2022-23 | 527,163 | NCES, Digest Table 204.70 |
| Autism prevalence at age 8, 2022 | 32.2 per 1,000 (about 1 in 31); boys 49.2, girls 14.3 | CDC, ADDM Network, 2025 |
| Autism prevalence at age 4, 2022 | 29.3 per 1,000; median diagnosis age 47 months | CDC, ADDM Network, 2025 |
| 8-year-olds with autism with documented autism eligibility | 67.3% | CDC, ADDM Network, 2025 |
| Diagnosed developmental disability, ages 3 to 17 | 7.40% (2019) to 8.56% (2021) | NCHS Data Brief 473 |
Context note: among 8-year-olds with autism, autism was the top eligibility category in 77.7% of the IEPs reviewed, and 39.6% of those with cognitive data had intellectual disability (CDC, 2025). Federal funding for these age groups is small: 540 million dollars for Part C and 420 million dollars for Part B preschool grants in FY2025 (CRS, 2026). How devices and communication aids for these children get paid for is tracked in our assistive technology funding statistics.
7. After Identification: Placement, Exits, Disputes and Funding
Identification is the start of a legal relationship, and the data on what follows show strain. Placement depends on category: 67.0% of students served spend 80% or more of the day in regular classes, but only 20.8% of students with intellectual disability and 40.6% of autistic students do (NCES, Digest Table 204.60). Of 464,190 students ages 14 to 21 who exited special education in 2021-22, 73.9% earned a regular diploma and 15.2% dropped out; for students with emotional disturbance the dropout share was 29.9% (NCES, Digest Table 219.90).
Disputes over evaluations and services are climbing. Written state complaints rose from 7,907 in 2024-25 to 11,523 in 2025-26 across 31 states surveyed by the Council for Exceptional Children and NASDSE, a 46% jump, after a 22% increase between 2022-23 and 2023-24 in federal data analyzed by CADRE (K-12 Dive, August 2026). Funding has not kept pace with identification: in FY2025, Part B appropriations equaled about 10.2% of national average per-pupil expenditure, just over 25% of the 40% full-funding level Congress set in 1975 (CRS, R44624, 2026).
| Metric | Value | Source |
|---|---|---|
| Students in regular classes 80% or more of the day, fall 2022 | 67.0% (12.5% less than 40%, 2.4% separate schools) | NCES, Digest Table 204.60 |
| 80%+ in regular classes, by category | Speech 88.5%, SLD 76.3%, autism 40.6%, intellectual disability 20.8% | NCES, Digest Table 204.60 |
| Students ages 14 to 21 exiting, 2021-22 | 464,190 (73.9% regular diploma, 9.8% alternative certificate, 15.2% dropped out) | NCES, Digest Table 219.90 |
| Dropout share by category, 2021-22 | Emotional disturbance 29.9%, SLD 11.2%, autism 7.8% | NCES, Digest Table 219.90 |
| Written state complaints, 31 states | 7,907 (2024-25) to 11,523 (2025-26), +46% | CEC and NASDSE survey via K-12 Dive, 2026 |
| Written state complaints, 2022-23 to 2023-24 | +22%; 81% resolved within 60 days in 2023-24 | CADRE via K-12 Dive, 2026 |
| Federal Part B share of average per-pupil spending, FY2025 | About 10.2% (40% promised) | Congressional Research Service, R44624 (2026) |
| Total IDEA appropriation, FY2025 | 15.4 billion dollars (14.2 billion for Part B grants to states) | Congressional Research Service, R44624 (2026) |
Context note: on-time complaint resolution in 2023-24 was 11% below its previous 10-year average (CADRE via K-12 Dive). CADRE’s own national dispute resolution summary and trends report for 2023-24 are published on its national data page.
Summary: Special Education IEP Statistics by the Numbers
| Metric | Value | Source |
|---|---|---|
| Students served under IDEA, 2022-23 | 7,525,941 (15.2%) | NCES, Digest Table 204.70 |
| Students served, 2023-24 | About 7.9 million | CRS, R44624 (2026) |
| Share served, 1976-77 | 8.3% | NCES, Digest Table 204.30 |
| Largest category | Specific learning disability, 32.0% | NCES, Digest Table 204.30 |
| Autism growth, 2019-20 to 2022-23 | 803,000 to 980,000 (+22%) | NCES, Digest Table 204.30 |
| Highest / lowest state share | Pennsylvania 21.1% / Hawaii 11.7% | NCES, Digest Table 204.70 |
| Puerto Rico share served | 37% | NCES Fast Facts, 2024 |
| State range, fall 2016 | 6.4% to 15.1% | GAO-19-348 |
| Boys vs girls served | 18.3% vs 10.3% | NCES, Digest Table 204.50 |
| Highest / lowest race group rate | AI/AN 18.9% / Asian 7.9% | NCES, Digest Table 204.40 |
| Intellectual disability, Black vs White students | 1.5% vs 0.7% of enrollment | NCES, Digest Table 204.50 |
| 504 plans, top vs bottom income (Oregon) | 2.9% vs 1.5% | Ainsworth et al., 2026, via The 74 |
| English learners with disabilities | 15.8% of ELs | NCES, Condition of Education, 2024 |
| Part C infants and toddlers served | 441,515 (4.01%) | ECTA Center, FFY 2023 |
| Autism prevalence at age 8 | 1 in 31 | CDC, ADDM Network, 2025 |
| Autistic 8-year-olds with autism eligibility | 67.3% | CDC, ADDM Network, 2025 |
| Students 80%+ in regular classes | 67.0% | NCES, Digest Table 204.60 |
| Regular diploma among exiters | 73.9% | NCES, Digest Table 219.90 |
| Written state complaints growth | +46% (31 states, 2024-25 to 2025-26) | CEC and NASDSE via K-12 Dive |
| Federal share of per-pupil spending | About 10.2% | CRS, R44624 (2026) |
Methodology and Sources
Every figure above was read during research for this article in a government table, a federal report or an article that names its underlying study. The US Department of Education’s own IDEA pages (ed.gov, sites.ed.gov/idea and data.ed.gov) blocked automated access, so the OSEP Annual Report to Congress and Section 618 files could not be read directly; we used the same IDEA Part B child count as republished by NCES in the Digest of Education Statistics, and the Congressional Research Service for the 2023-24 total. Statistics circulating on advocacy and vendor blogs without a primary document were excluded.
- NCES Digest of Education Statistics: Table 204.30, disability type, Table 204.40, race/ethnicity, Table 204.50, sex, race and disability type, Table 204.60, educational environment, Table 204.70, by state, Table 219.90, exits
- NCES: Fast Facts, Students with disabilities, Condition of Education, Students With Disabilities, Condition of Education, English Learners in Public Schools
- Congressional Research Service: The Individuals with Disabilities Education Act (IDEA) Funding: A Primer, R44624, updated February 13, 2026
- Government Accountability Office: GAO-19-348, Varied State Criteria May Contribute to Differences in Percentages of Children Served (2019), GAO-13-137, Standards Needed to Improve Identification of Racial and Ethnic Overrepresentation (2013)
- CDC: ADDM Network, Prevalence and Early Identification of Autism Spectrum Disorder, MMWR Surveillance Summary 74(2), 2025, NCHS Data Brief 473, Diagnosed Developmental Disabilities in Children 2019-2021
- Early childhood: ECTA Center, Part C national child count 1987-2023 (updated September 2024)
- Pew Research Center: What federal education data shows about students with disabilities in the US (2023)
- Disputes: K-12 Dive, Special education state complaints jump nearly 50% (August 2026), citing the CEC and NASDSE survey and CADRE national dispute resolution data
- Reporting on named studies: The 74, Wealthy students more likely to get disability accommodations (May 2026), on the Ainsworth et al. UC Irvine working paper; Education Week, How Texas keeps special education enrollment low (2016), on the Houston Chronicle investigation; Education Week, special education enrollment has doubled (2023)
- Data watch: Most recent available data for counts, categories, race, sex, state shares and placements is the 2022-23 school year (NCES Digest 2023 tables, fall 2022 placements), and exits are from 2021-22; newer Section 618 files exist at the Department of Education but could not be read, and the 2023-24 total of about 7.9 million comes only from a rounded CRS figure. NCES Fast Facts rounds 2022-23 state shares (21% for Pennsylvania, New York and Maine; 12% for Idaho and Hawaii), while Digest Table 204.70 gives Pennsylvania 21.1%, New York 20.7%, Maine 20.6%, Idaho 12.1% and Hawaii 11.7%; we cite the Digest values. Pew’s 2021-22 ranking (New York 20.5% highest, Hawaii 11.3% lowest) uses an earlier year. The NCES Condition of Education placement figures (67%, 16%, 13%) are rounded versions of Table 204.60. The Oregon 504 study is a working paper read through The 74, and its income cutoffs were not stated. GAO disproportionality (2013) and state range (2016) data and the Texas 8.5% benchmark (2004) are older baselines. The 46% complaint jump covers 31 states only, and CADRE’s 2023-24 PDF could not be parsed, so its figures come via K-12 Dive. NCHS data are parent-reported diagnoses, not school eligibility.
Last updated: October 3, 2026. We update this roundup quarterly, and the next refresh is expected when NCES publishes 2023-24 IDEA tables in the Digest of Education Statistics and the Department of Education releases its next Annual Report to Congress on IDEA.