Invisible disabilities, also known as hidden disabilities or non-visible disabilities, are disabilities that are not immediately apparent. They are typically chronic illnesses and conditions that significantly impair normal activities of daily living. Invisible disabilities can hinder a persons efforts to go to school, work, socialize, and more. Although the disability creates a challenge for the person who has it, the reality of the disability can be difficult for others to recognize or acknowledge. People with invisible disabilities are protected by national and local disability laws, such as the Americans with Disabilities Act in the US.

In simple terms, an invisible disability is a physical, mental, or neurological condition that is not always obvious to the onlooker but can sometimes or always limit daily activities. These disabilities can range from mild challenges to severe limitations and vary from person to person. Examples of invisible disabilities include debilitating pain, fatigue, dizziness, cognitive dysfunctions, brain injuries, learning differences, mental health disorders, hearing and vision impairments, and more.

It is important to note that some people with disabilities that are not obvious prefer the phrase "non-visible" instead of "invisible" because the latter can erase the legitimacy of the disability or imply that it does not exist.