Resident Population in Adams County, MS was 30.06100 Thous. of Persons in January of 2025, according to the United States Federal Reserve. Historically, Resident Population in Adams County, MS reached a record high of 39.17200 in January of 1982 and a record low of 28.38300 in January of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Adams County, MS - last updated from the United States Federal Reserve on June of 2026.