Autism was first clearly described as a distinct condition in 1943 by psychiatrist Leo Kanner, who coined the term “early infantile autism” for a group of children with unique social and behavioral traits. The word “autism” itself, though, dates back to 1911, when Eugen Bleuler used it to describe a symptom of schizophrenia rather than a separate developmental condition.

When Was Autism First Identified?

(Quick Scoop style overview)

Early clues before the word “autism”

Long before anyone used the term “autism,” some doctors were noticing children who didn’t seem to fit typical developmental patterns. These early cases were not called autism at the time, but many historians think they describe autistic traits.

  • 1799–1801 – Victor, the “Wild Boy of Aveyron” : French physician Jean‑Marc Gaspard Itard wrote about Victor, a boy found living in the woods who showed profound social withdrawal and communication difficulties, which some modern experts think might have been autism‑related traits (though this is speculative).
  • Early 1800s – John Haslam and others : British physician John Haslam and other clinicians described individuals with unusual social behavior and communication challenges, but there was no clear diagnostic category like autism yet.

These early observations planted the seeds for later ideas about developmental differences, even if people did not yet recognize autism as its own condition.

1911: The word “autism” appears

The actual word “autism” comes from Swiss psychiatrist Eugen Bleuler , who introduced it in 1911.

  • Bleuler used “autism” to describe extreme social withdrawal in some people with schizophrenia, emphasizing retreat into one’s “inner world.”
  • He derived the term from the Greek autos , meaning “self,” highlighting a focus on the self and disconnection from others.

At this point:

  • “Autism” was a symptom within schizophrenia, not a separate childhood developmental diagnosis.
  • Children with autistic traits were often folded into other categories or blamed on “bad parenting,” especially the (now discredited) “refrigerator mother” theory.

1943: Leo Kanner and “early infantile autism”

Most historians consider 1943 the moment autism was first formally identified as its own condition.

Austrian‑American psychiatrist Leo Kanner published a famous paper titled “Autistic Disturbances of Affective Contact” , based on 11 children he followed.

He noticed a consistent pattern:

  • Marked social withdrawal and a desire for “aloneness.”
  • Unusual or delayed speech , including echolalia (repeating words or phrases).
  • Repetitive behaviors and intense focus on specific objects or routines.
  • Difficulties adjusting when routines were changed (“insistence on sameness”).

Kanner called this pattern “early infantile autism,” and crucially, he framed it as a distinct childhood condition , not a form of schizophrenia. This is why many experts answer the question “When was autism first identified?” with: 1943, by Leo Kanner.

1944: Hans Asperger and a different profile

Around the same time, in 1944, Austrian pediatrician Hans Asperger described another group of children who shared some autistic features but had a different profile.

He wrote about children who:

  • Had significant social difficulties but relatively strong verbal skills.
  • Showed intense, narrow interests and repetitive patterns.
  • Often had clumsiness or motor coordination issues.

This pattern later became known as Asperger’s syndrome and is now understood as part of autism spectrum disorder (ASD) rather than a separate condition.

When did autism become an “official” diagnosis?

Even after Kanner’s and Asperger’s work, it took decades for autism to be formally recognized in diagnostic manuals.

  • 1952 – DSM‑I : The first edition of the Diagnostic and Statistical Manual (DSM‑I) did not yet list autism as we know it; related features were usually placed under childhood schizophrenia or other categories.
  • 1980 – DSM‑III : Autism was finally included as a separate developmental disorder with more defined criteria.
  • Later DSM editions (like DSM‑IV and DSM‑5) gradually shifted toward the idea of an autism spectrum , which is the framework widely used today.

So, while the term dates to 1911 and Kanner’s description to 1943, autism as an official, standardized diagnosis really solidified in the late 20th century, especially with DSM‑III in 1980.

Forum & “trending” context: “We didn’t have autism back then”

You’ll often see heated forum threads where someone says, “There was no autism when I was a kid; we just called them odd.” That sentiment shows up repeatedly in online discussions and parenting forums.

A few important counterpoints from history:

  • Autistic people absolutely existed , but were often labeled “eccentric,” “odd,” or “slow,” or misdiagnosed with other conditions.
  • Earlier generations had less awareness and fewer diagnostic tools , so many adults today are only getting diagnosed in their 30s, 40s, or later.
  • Growth in autism diagnoses over recent decades is strongly linked to broader criteria and better recognition , not proof that autism is “new.”

A recent forum post from an autism‑parenting community, for example, vents about older relatives insisting autism “didn’t exist” in their time, while commenters point out that those “odd” kids in the village likely would be recognized today as autistic. That kind of conversation is now common across social media and support communities.

Many people are realizing, in adulthood, that what was once dismissed as shyness, quirks, or being “difficult” may actually have been undiagnosed autism.

Mini timeline of key milestones

[1][3] [3][1] [9][1][3] [1][3][9] [5][3][9][1] [3][9][1] [5][9][1][3] [9][5] [7][8] [7][8] [1][3][9] [3][9]
Year What happened Why it matters
1799–1801 Jean-Marc Gaspard Itard documents Victor, the “Wild Boy of Aveyron.”Early description of a child with traits some now interpret as possibly autistic, though this remains speculative.
1911 Eugen Bleuler coins the term “autism” within schizophrenia.Introduces the word “autism,” but not yet as a separate developmental diagnosis.
1943 Leo Kanner publishes on “early infantile autism.”Widely regarded as the first clear identification of autism as a distinct condition in children.
1944 Hans Asperger describes a “milder” form later called Asperger’s syndrome.Expands understanding to include verbally fluent, intellectually able autistic individuals.
1952 DSM-I published; autism not yet clearly separated, more tied to childhood schizophrenia.Shows how autism was once folded into broader psychiatric categories.
1980 DSM-III introduces autism as a distinct diagnostic category.Marks the start of modern, standardized autism diagnosis.

Direct answer to your question

  • If you mean “When was autism first clearly identified as its own condition?”1943, by Leo Kanner, in his description of “early infantile autism.”
  • If you mean “When did the word ‘autism’ first appear?”1911, when Eugen Bleuler used it for a symptom of schizophrenia.
  • If you mean “When were autistic traits first recorded in any form?” → Late 1700s and early 1800s case reports (like Victor), but these were not labeled autism at the time and are interpreted that way only in hindsight.

TL;DR: Autism as a distinct diagnosis was first identified in 1943 by Leo Kanner, though the word “autism” dates to 1911 and earlier clinical descriptions of autistic‑like traits go back to the early 1800s.

Information gathered from public forums or data available on the internet and portrayed here.