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Understanding autism. Finding support. Building belonging.

Clear information and practical resources for autistic people, families, caregivers, and educators. Whether you have questions about development, are exploring autism for yourself, or want to create a more inclusive community, start here.

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Learn about autism, understand screening and evaluation, locate national and state resources, or explore research explained in everyday language.

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If you have concerns about development, write down what you notice and speak with a qualified healthcare professional. You do not need every answer before asking for help.

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What Is Autism?

Autism is a lifelong neurodevelopmental condition that can affect communication, social interaction, behavior, interests, and everyday experiences.

Screening & Diagnosis

Screening identifies possible developmental concerns; it does not diagnose autism. Learn about evaluation and what happens next.

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Communication and sensory experiences, support needs, co-occurring conditions, and life after a diagnosis.

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Autism research, explained clearly: what researchers studied, what they found, and what remains uncertain.

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Autism Data Explained

What official data can — and cannot — tell us.

1 in 31eight-year-old children identified with autism in 16 monitored U.S. communitiesCDC ADDM Network · 2022 data
18 & 24months: ages for autism-specific screening at well-child visitsAAP, as described by CDC
Any agesupport can help — and autism can be diagnosed at any ageNIMH · CDC

Autism identification among 8-year-old children in monitored U.S. communities

Autism identification among 8-year-old children in monitored U.S. communities, 2000–2022Combined prevalence per 1,000 children rose from 6.7 in 2000 to 32.2 in 2022 (about 1 in 31).01020302000: 6.7 per 1,000 (about 1 in 150), 6 sites2002: 6.6 per 1,000 (about 1 in 150), 14 sites2004: 8.0 per 1,000 (about 1 in 125), 8 sites2006: 9.0 per 1,000 (about 1 in 110), 11 sites2008: 11.3 per 1,000 (about 1 in 88), 14 sites2010: 14.7 per 1,000 (about 1 in 68), 11 sites2012: 14.5 per 1,000 (about 1 in 69), 11 sites2014: 16.8 per 1,000 (about 1 in 59), 11 sites2016: 18.5 per 1,000 (about 1 in 54), 11 sites2018: 23.0 per 1,000 (about 1 in 44), 11 sites2020: 27.6 per 1,000 (about 1 in 36), 11 sites2022: 32.2 per 1,000 (about 1 in 31), 16 sites1 in 1501 in 1101 in 681 in 591 in 441 in 31200020022004200620082010201220142016201820202022per 1,000 children

Surveillance years 2000–2022. Combined prevalence per 1,000 eight-year-olds across CDC’s Autism and Developmental Disabilities Monitoring (ADDM) Network sites. The number of sites changed between years (6 to 16), and so did geographic coverage and methods — these changes matter when reading the trend. These figures come from monitored communities; they are not a count of all U.S. children and do not explain causes. Source: CDC, Data and Statistics on Autism Spectrum Disorder (page updated April 15, 2025).

Show the data table
Surveillance yearSitesPer 1,000About
20221632.21 in 31
20201127.61 in 36
20181123.01 in 44
20161118.51 in 54
20141116.81 in 59
20121114.51 in 69
20101114.71 in 68
20081411.31 in 88
2006119.01 in 110
200488.01 in 125
2002146.61 in 150
200066.71 in 150

Explore research explained

Selected Research & Resource Updates

Dated summaries of selected studies, each linked to the original source.

Research study

Differences within the autism spectrum

July 9, 2025 · Nature Genetics

Researchers analyzed clinical and developmental characteristics alongside genetic information and identified four research-derived groups. These are not four new official diagnoses or a test assigning every autistic person to a fixed type.

Read the original source
Review

Interpreting research subtypes

July 2026 · Translational Psychiatry

A review discusses data-driven subtyping and questions about stability over time and usefulness for predicting outcomes. Research categories need further validation before clinical use.

Read the original source
Laboratory study

Laboratory models of early brain development

January 29, 2026 · Nature

Researchers used human cortical organoid models to examine genetically defined autism and developmental pathways. Laboratory models represent selected aspects of biology; this work is not a clinical diagnostic test or established treatment.

Read the original source

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