Resident Population in Grenada County, MS was 20.93100 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Grenada County, MS reached a record high of 23.31800 in January of 1999 and a record low of 19.60000 in January of 1972. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Grenada County, MS - last updated from the United States Federal Reserve on April of 2026.