The CDC/ATSDR Social Vulnerability Index (SVI) is a place-based index, database, and mapping tool to assist public health officials with identifying and quantifying socially vulnerable communities. We have developed and validated SVI databases for U.S. census tracts and counties at both national and state levels, including databases for Puerto Rico and tribal tracts. Since starting development of the SVI in 2007 and releasing the first database in 2011, we have produced six SVI databases for the years of 2000, 2010, 2014, 2016, 2018, and 2020 with planned updates for every two years.