The U.S. Census Bureau released the 2020 Annual Estimates of the Resident Population for Counties and County Equivalents in the United States. This annual vintage release of Mississippi’s 82 counties and county equivalents population estimates follows the release of the 2020 Census national and state total populations. The data used to compile the population estimates come from various sources such as the previous decennial census, vital records (births and deaths), and the Internal Revenue Service.
Deleveaux, Jamiko, "State of Mississippi and Counties Population Components of Change, 2020" (2021). Population Briefs. 7.