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R43047

Prevalence of Mental Illness in the United States: Data Sources and Estimates

Published Jan 19, 2018Updated Jun 20, 2025

The Congressional Research Service is a nonpartisan policy and legal analysis arm of the Library of Congress. CRS reports are written for members of Congress and their staff, not the public — but they’re made available openly through Congress.gov.

Prevalence of Mental Illness in the United States: Data Sources and Estimates — Informed