CDC/ATSDR Social Vulnerability Index (SVI)

The CDC/ATSDR Social Vulnerability Index (SVI) uses U.S. Census Bureau data to help local officials identify communities that may need support before, during, or after hazardous events.

Published by the CDC's Geospatial Research, Analysis, and Services Program (GRASP), the SVI ranks census tracts on 16 social factors grouped into four themes:

1. Socioeconomic Status – poverty, unemployment, housing cost burden, low educational attainment, uninsured population
2. Household Characteristics – age extremes (65+, 17 and younger), disability, single-parent households, limited English proficiency
3. Racial & Ethnic Minority Status – racial/ethnic minority population, English language proficiency
4. Housing Type & Transportation – multi-unit structures, mobile homes, crowding, no vehicle access, group-quarters population

This dataset contains one table per SVI release year, each covering all U.S. census tracts. Different years use slightly different variables and source data (decennial Census vs. American Community Survey 5-year estimates), so cross-year comparisons of percentile ranks should be made with caution.