Resident Population in Maryland was 6265.34700 Thous. of Persons in January of 2025, according to the United States Federal Reserve. Historically, Resident Population in Maryland reached a record high of 6265.34700 in January of 2025 and a record low of 1189.00000 in January of 1900. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Maryland - last updated from the United States Federal Reserve on March of 2026.