Autism is a condition found all over the world, but reported rates can look very different depending on where you live. Families often ask me: “What countries have the most autism?” 

The answer isn’t simple. Some countries report higher numbers because they have better diagnostic tools and awareness, while others may have lower numbers simply because autism isn’t being identified as often.

In this blog, I’ll break down the countries with the highest reported autism rates and explain why these numbers vary so much.

Why Autism Rates Differ Around the World

Before diving into the list, it’s important to understand that autism doesn’t necessarily occur more often in one country than another—it’s often about awareness, diagnosis, and access to healthcare.

• High-income countries tend to report higher autism rates because screening and early diagnosis are more widely available.

• Low- and middle-income countries may underreport autism due to limited services or cultural stigma.

• As awareness grows, reported rates usually increase—not because autism is “spreading,” but because more children are being identified.

Countries with the Highest Reported Autism Rates

1. United States

The U.S. is one of the highest autism rates in the world. According to the CDC, about 1 in 31 children is diagnosed with autism. Widespread screening programs, strong advocacy, and better awareness contribute to these numbers.

2. South Korea

A large study in South Korea found autism rates as high as 1 in 38 children, which is among the highest ever reported. Researchers believe the thorough screening process—including children not previously diagnosed—played a big role.

3. Canada

Canada reports rates close to 1 in 50 children. Increased awareness and strong healthcare systems have made it easier for families to access diagnostic services.

4. United Kingdom

In the UK, estimates suggest about 1 in 57 children has autism. The National Health Service (NHS) has made screening and awareness campaigns more accessible in recent years.

5. Sweden

Sweden has one of the most detailed health registries in the world, and studies there estimate autism rates around 1 in 63 children. Early identification and strong support services play a role.

6. Japan

Japan reports rising autism diagnoses, currently estimated at about 1 in 55 children. Improvements in awareness and education have increased identification.

7. Australia

Australia estimates that 1 in 150 people are on the spectrum, though advocacy groups believe the real number may be higher as awareness continues to grow.

Why Some Countries Report Lower Rates

In many countries across Africa, Asia, and Latin America, reported autism rates are much lower. This doesn’t mean autism is less common—it often means:

• Fewer professionals trained in diagnosis

• Limited healthcare resources

• Cultural stigma surrounding developmental differences

• Families not seeking or receiving evaluations

Numbers can feel overwhelming, but what matters most is access to early diagnosis and support. Regardless of where you live, early intervention helps children with autism build essential skills and independence.

At Blossom ABA Therapy, we focus on helping children thrive—no matter the statistics. Our ABA services are personalized to meet each child’s needs through home-based ABA, center-based ABA, and school-based ABA.

We proudly serve families in Georgia, Tennessee, Virginia, and North Carolina.

If you’re seeking support for your child, we’d love to help you take the next step.

FAQs

Does autism really occur more in certain countries?

Not necessarily. Reported rates vary because of differences in diagnosis, awareness, and healthcare access.

Why is the U.S. autism rate so high?

Because screening is common, awareness is widespread, and more children are being diagnosed earlier.

Are autism rates rising worldwide?

Yes, reported rates are increasing globally, but this is largely due to improved awareness and better diagnostic practices—not because autism itself is becoming more common.

Sources:

• https://pmc.ncbi.nlm.nih.gov/articles/PMC12279874/

• https://worldpopulationreview.com/country-rankings/autism-rates-by-country

• https://pmc.ncbi.nlm.nih.gov/articles/PMC9947250/

• https://www.statista.com/chart/34227/number-of-children-diagnosed-with-autism/?srsltid=AfmBOoo4Moo5XIvkIY8e37gM6b5ZWp-zpFGxpK-ByszerzDkj0CuuVkT

• https://www.who.int/news-room/fact-sheets/detail/autism-spectrum-disorders