New data now available for the 2020 Census Participation indicator from the 2025 County Health Rankings.

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The 2020 census self-response rate reports the percentage of all households that responded by internet, paper questionnaire, or telephone. Data were sourced from the Census Operational Quality Metrics and are used in the 2025 County Health Rankings. Note that estimates may differ slightly from original sources due to back-calculations using ACS housing unit data, and Connecticut planning regions report only rates due to boundary differences.