Special education statistics show the scale and diversity of services provided under the Individuals with Disabilities Education Act (IDEA). In 2022–23, 7.5 million students ages 3–21 received special education and/or related services under IDEA, representing 15 percent of public school students. The figures below cover enrollment, disability categories, educational environments, demographics, state variation, early intervention, and graduation outcomes.
Contents
- How many students receive services
- Which disability categories are most common
- Enrollment by age, sex, and race or ethnicity
- Where students receive instruction
- How participation varies by state
- Early intervention and outcomes
How many students receive services
The National Center for Education Statistics (NCES) reported 7.5 million students ages 3–21 served under IDEA in school year 2022–23. That total was 15 percent of public school students. The same NCES source reports that the number served increased from 6.4 million in 2012–13 to 7.5 million in 2022–23, while the share of public school students increased from 13 percent to 15 percent over that period. (NCES, “Students With Disabilities”)
The recent trend was not perfectly continuous. Enrollment fell from 7.3 million in 2019–20 to 7.2 million in 2020–21. By 2022–23, the number served was 3 percent higher than in 2019–20. These are school-year counts, so they describe students served during the specified academic periods rather than a single-day estimate. (NCES, “Students With Disabilities”)
Longer-term figures place current enrollment in historical context. The 2025 Annual Report to Congress on IDEA says that 3.6 million children were served under the Education for All Handicapped Children Act, IDEA’s predecessor, in 1976. The same report says more than 8 million children were served under IDEA in 2024. It also reports that the share of public school students served increased from 8.3 percent in 1976–77 to more than 15 percent in 2022–23. The 1976 and 2024 figures use the report’s historical framing and should not be treated as independently rechecked here. (2025 Annual Report to Congress on IDEA)
Which disability categories are most common
IDEA enrollment includes several disability categories, and the largest groups in 2022–23 were specific learning disabilities, speech or language impairments, and other health impairments. NCES counted 2,408,411 students with a specific learning disability, 1,429,556 with a speech or language impairment, and 1,149,816 with another health impairment.
Autism was identified for 980,272 students. Developmental delay accounted for 518,045 students, intellectual disability for 434,179, and emotional disturbance for 326,875. These counts cover students ages 3–21 served under IDEA in school year 2022–23. (NCES, “Children and students 3 to 21 years old served under IDEA, Part B”)
The category shares reported by NCES make the distribution easier to compare:
| Disability category | Share of students served under IDEA, 2022–23 |
|---|---|
| Specific learning disability | 32% |
| Speech or language impairment | 19% |
| Other health impairment | 15% |
| Autism | 13% |
| Developmental delay | 7% |
| Intellectual disability | 6% |
| Emotional disturbance | 4% |
The percentages describe each category’s share of students ages 3–21 served under IDEA in 2022–23. They are not prevalence rates for the entire child population, and the categories should not be added to make a separate population estimate. (NCES, “Students With Disabilities”)
Enrollment by age, sex, and race or ethnicity
NCES reported 364,521 male children ages 3–5 and 162,574 female children ages 3–5 served under IDEA Part B in 2022–23. Among students ages 5–21, 4,517,884 were male and 2,411,466 were female. These counts use the age groups and Part B coverage specified in the NCES table. (NCES, “Children and students 3 to 21 years old served under IDEA, Part B”)
The same table reported the following numbers of American Indian or Alaska Native, Asian, Black, Hispanic, Pacific Islander, and White children and students ages 3–21 served under IDEA Part B in 2022–23:
- American Indian or Alaska Native: 85,066
- Asian: 213,901
- Black: 1,269,666
- Hispanic: 2,106,840
- Pacific Islander: 21,378
- White: 3,438,067
These are counts of students served, not rates adjusted for the size of each racial or ethnic population. A count comparison therefore does not by itself show whether one group had a higher or lower participation rate. The table’s population categories and terminology are retained here to match the source. (NCES, “Children and students 3 to 21 years old served under IDEA, Part B”)
Where students receive instruction
Educational environment statistics describe how much of the school day school-age students served under IDEA spend in general classes. In fall 2022, 67.0 percent spent at least 80 percent of the day in general classes. Another 15.8 percent spent 40–79 percent of the day in general classes, while 12.5 percent spent less than 40 percent. (NCES, “Percentage distribution of school-age students served under IDEA, Part B”)
The school-location figures provide a second view of educational setting. In fall 2022, 95 percent of school-age students served under IDEA were enrolled in regular schools. Two percent were enrolled in separate schools for students with disabilities, and 2 percent were parentally placed in regular private schools. A combined 1 percent were homebound or in hospitals, separate residential facilities, or correctional facilities. (NCES, “Students With Disabilities”)
The share spending at least 80 percent of the day in general classes varied by disability category in fall 2022:
- Speech or language impairments: 88.3 percent
- Specific learning disabilities: 75.1 percent
- Other health impairment: 70.0 percent
- Emotional disturbance: 55.9 percent
- Autism: 40.6 percent
These percentages are educational-environment measures for students served under IDEA, not measures of academic performance or service quality. They also show why an overall inclusion percentage should not be assumed to describe every disability category. (NCES, “Percentage distribution of school-age students served under IDEA, Part B”)
Historical reporting shows a substantial change in this measure. The 2025 Annual Report to Congress on IDEA reports that the percentage of school-aged students with disabilities spending at least 80 percent of the school day in the regular classroom increased from 33.1 percent in 1990 to 67.8 percent in 2023. The 2023 figure is close to, but not identical with, the NCES fall 2022 figure of 67.0 percent because the measurement periods differ. (2025 Annual Report to Congress on IDEA)
How participation varies by state
In 2022–23, the percentage of public school students served under IDEA ranged from 12 percent to 21 percent across the 50 states and the District of Columbia. Pennsylvania, New York, and Maine each reported 21 percent. Idaho and Hawaii each reported 12 percent. (NCES, “Students With Disabilities”)
The jurisdictions in the broader reporting set had different values. Puerto Rico served 37 percent of public school students under IDEA in 2022–23, while the Northern Mariana Islands served 11 percent and the U.S. Virgin Islands served 9 percent. These figures should be kept separate from the 50-state-and-District-of-Columbia range because the source reports them as jurisdictions outside that stated range. (NCES, “Students With Disabilities”)
State and jurisdiction percentages are participation measures within each public-school student population. They are not direct rankings of special education quality, disability prevalence, identification practices, or available services. Differences can reflect the composition of student populations and how eligibility and services are administered, but the supplied figures do not quantify those possible causes.
Early intervention and outcomes
IDEA services begin before school age as well as during the school years. In 2023, 460,321 infants and toddlers from birth through age 2 were served under IDEA Part C in the 50 states and the District of Columbia. That represented 4.2 percent of the resident birth-through-age-2 population. (2025 Annual Report to Congress on IDEA)
Graduation statistics show a gap between students with disabilities and all public high school students in the adjusted cohort measure. In 2021–22, the adjusted cohort graduation rate was 71 percent for students with disabilities, compared with 87 percent for all public high school students. (NCES, “High School Graduation Rates”)
The IDEA annual report also provides an exit measure for 2022–23: 75.8 percent of students with disabilities exited school by receiving a regular high school diploma. In 1987–88, the corresponding reported percentage was 42 percent. These figures come from the annual report’s exit measure and should not be substituted directly for the 2021–22 adjusted cohort graduation rate, which uses a different statistic and period. (2025 Annual Report to Congress on IDEA)
Together, the measures describe different parts of the education pathway: 4.2 percent participation in early intervention among children from birth through age 2 in 2023, 15 percent of public school students ages 3–21 served under IDEA in 2022–23, and graduation or school-exit measures reported for later stages. Because the definitions, age ranges, and measurement periods differ, each statistic is most useful when read with its stated scope.