How many people have mental illness in the US?

Updated Feb. 3, 2026Refreshed annually
About 61.5 million adults had a mental illness in 2024. That's the equivalent of 23.4% of the adult population of the US, or 11 in 47 adults. This data comes from an annual survey by the Substance Abuse and Mental Health Services Administration (SAMHSA), which defines mental illness as a range of disorders, from mild to severe, affecting a person's thinking, mood, or behavior.

61.5M

adults had a mental illness in 2024

23.4%

of adults had a mental illness in 2024
A person’s own demographics, as well as the social and economic conditions in which they live, can influence health outcomes such as mental illness.
Mental illness rates vary by age group. In 2024, people who were 18–25 years old had the highest rate of mental illness at 33.2%. This was 9.8 percentage points higher than the average for all adults. In 2015, the rate for the 18-25 age group was 3.8 percentage points higher than average.

In 2024, young adults had the highest rate of mental illness.

Percentage of adults who had mental illness

Ask the data
Beta

We use AI to summarize the data, charts, and analysis we have on USAFacts

How do mental illness rates vary by demographics?

The rate of mental illness differs among races. In 2024, multiracial people had the highest rate of mental illness at 35.5%. This was 12.1 percentage points higher than the national rate for that year.

In 2024, multiracial people had the highest rate of mental illness.

Percentage of adults who had mental illness

Income levels also introduce variances in mental illness rates. In 2024, people who were below the poverty line had the highest rate of mental illness at 29%. That was 5.6 percentage points greater than the national rate.

In 2024, people below the poverty line had the highest rate of mental illness.

Percentage of adults who had mental illness

What states have the highest and lowest rates of mental illness?

SAMHSA also calculates mental illness rates at the state level using a different method than for the US as a whole. Researchers combine two consecutive years of data to increase the sample size for each state and use statistical models to produce more reliable state estimates of mental illness. National estimates, by contrast, are calculated directly from a single year of survey data without using statistical modeling.
In 2023–2024, Oregon had the country's highest rate of mental illness at 31.6%, 8.2 percentage points greater than the national rate. New Jersey had the lowest rate at 18.1%, 5.3 percentage points less than the nation overall.

Oregon had the highest rate of mental illness in 2023–2024.

Percentage of adults who had mental illness

If you are struggling with mental health issues, call the SAMHSA National Helpline, 1-800-662-HELP (4357), a free, confidential, 24/7, year-round treatment referral and information service. Or, call the 988 Suicide and Crisis Lifeline. If you are thinking about harming yourself or attempting suicide, tell someone who can help immediately and call 911.

Rate of mental illness, by state highest to lowest (2023–2024)

Rate of mental illness, by state highest to lowest (2023–2024)
1.

Oregon 

31.6%
2.

Vermont 

29.1%
3.

Washington, DC

29%
4.

West Virginia

28.1%
5.

Washington state

27.9%
6.

New Hampshire

27.7%
7.

Tennessee 

27%
8.

Maine 

26.7%
9.

Utah 

26.7%
10.

Arkansas 

26.6%

Keep exploring

Methodology

USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.

The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.

Page sources

USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.