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Special Needs Care Network · Data Report

Autism Rates by State

Nationally, about 1 in 31 eight-year-olds is identified with autism in clinical records, yet public schools serve just 1 in 72 under an autism classification. Where a child lives changes their odds of being counted, and of finding care, by nearly fourfold.

Sources: CDC ADDM 2022 · U.S. Dept. of Education IDEA, 2023–24 · U.S. Census 2023 Updated: July 2026
1 in 31
Clinical prevalence (CDC ADDM, age 8, 2022). The gold-standard, records-based rate.
1 in 72
School-identified nationally (IDEA, ages 5–21). Far fewer are served under the autism category than clinical rates imply.
3.7×
State spread. Massachusetts identifies 1 in 51; Montana, 1 in 188. A difference of systems, not biology.

The identification map

Each state shaded by its IDEA autism identification rate, ages 5–21 (school year 2023–24). Darker means more children are formally identified and served.

5 / 1kper 1,000 children19.5 / 1k
Non-categorical (IA, NM)

Every state, ranked

Sort by any column. Identification rate is the share of children ages 5–21 served under IDEA's autism category. "CDC site" shows clinical prevalence for a monitored community in that state where one exists, a partial area, not the whole state.

Directory

* CDC ADDM sites cover a defined community (often part of one metro or county), not the entire state. Iowa and New Mexico report special education non-categorically and publish no autism-specific count.

How we built this

Identification rate = children ages 5–21 served under IDEA Part B's autism category (U.S. Dept. of Education, IDEA Section 618 child count, SY2023–24) divided by the state's resident population ages 5–21 (U.S. Census Bureau population estimates, 2023), per 1,000.

  • Clinical prevalence comes from the CDC's Autism and Developmental Disabilities Monitoring (ADDM) Network, surveillance year 2022 (published 2025), children aged 8 across 16 sites. National figure: 32.2 per 1,000 (1 in 31).
  • Why the two numbers differ: IDEA counts only children formally served under the autism eligibility category in public schools; many autistic children are served under other categories, in general education, or privately.
  • Provider options reflect how many special-needs providers a family will find in the Special Needs Care Network directory for that state, grouped into broad tiers. It is a guide to what's listed here, not a census of every provider in the market.

Use this data

This report is free to republish under a CC BY 4.0 license. Please credit Special Needs Care Network with a link back to this page.

Download the dataset

All 51 rows as a clean CSV: IDEA identification rate, CDC ADDM prevalence, and provider tier by state.

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Embed the interactive map

Drop the live map and ranked table into your own page with this snippet:

<iframe src="https://specialneedsusa.com/data/autism-rates-by-state?embed=1" width="100%" height="900" style="border:1px solid #E5E9F0;border-radius:8px" title="Autism Rates by State — Special Needs Care Network" loading="lazy"></iframe>
Cite this report

Special Needs Care Network. “Autism Rates by State (2026).” specialneedsusa.com, July 2026. https://specialneedsusa.com/data/autism-rates-by-state

Primary sources: CDC ADDM 2022 IDEA Section 618 U.S. Census

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Federal data (CDC, U.S. Dept. of Education, U.S. Census). Provider tiers derived from Special Needs Care Network directory coverage. Last updated July 2026. More reports at specialneedsusa.com/data.

Source: Autism Rates by State · Special Needs Care Network