Asperger’s Syndrome: Prevalence, Statistics, and Facts

Asperger’s syndrome is now subsumed under Autism Spectrum Disorder (ASD) in DSM-5 (2013) and ICD-11 (2022), but the term remains in common use.

Epidemiology (CDC ADDM Network, 2020 data)

• Overall ASD prevalence: 1 in 36 children (2.8%) in the U.S. (updated from 1 in 44).
• Sex ratio: ~4:1 male-to-female (formerly cited 3:1).
• Asperger’s/ASD without intellectual disability: Estimated ~40–50% of ASD cases.

Key Features

• Average/above intelligence, no language delay.
• Social communication challenges, restricted interests, repetitive behaviors.
• Often diagnosed later than classic autism (mean ~8–11 years).

Outcomes

Early intervention (speech, OT, social skills, CBT) improves adaptive functioning. Many adults live independently, work, and form relationships; support needs vary.