What’s the difference between mental illness and insanity?

Medically reviewed by Jesse Hanson, Ph.D.Jesse Hanson, Ph.D. Written by Mark Dombeck, Ph.D.Mark Dombeck, Ph.D. – Updated on September 7, 2025

Question

What is the difference between mental illness and insanity?

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Answer

If there is a difference at all, it is one of scope. Mental illness is usually a broader and more inclusive term than Insanity. Insanity is usually reserved for describing severe conditions involving psychotic-like breaks with reality, while Mental Illness can include both severe and milder forms of mental problems (such as anxiety disorders and mild depressions).

Medical Content

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Jesse Hanson, Ph.D.
Medical Review
Clinical Affairs Director

Jesse Hanson, Ph.D., is a somatic psychologist with more than 20 years of experience in clinical psychology and neuropsychology.

Published
May 31, 2024
Updated
Sep 07, 2025

Mark Dombeck, Ph.D.
Author
Medical Reviewer, Writer

Mark Dombeck, Ph.D. is a trauma-informed psychologist with over 30 years of experience helping people navigate mental health challenges.

Published
May 31, 2024
Updated
Sep 07, 2025
Medical Content

The Clinical Affairs Team at MentalHealth.com is a dedicated group of medical professionals with diverse and extensive clinical experience. They actively contribute to the development of content, products, and services, and meticulously review all medical material before publication to ensure accuracy and alignment with current research and conversations in mental health. For more information, please visit the Editorial Policy.

About MentalHealth.com

We are a health technology company that guides people toward self-understanding and connection. The platform provides reliable resources, accessible services, and nurturing communities. Its purpose is to educate, support, and empower people in their pursuit of well-being.