Resident Population in Washington-Arlington-Alexandria, DC-VA-MD-WV (MSA) was 6465.72400 Thous. of Persons in January of 2025, according to the United States Federal Reserve. Historically, Resident Population in Washington-Arlington-Alexandria, DC-VA-MD-WV (MSA) reached a record high of 6465.72400 in January of 2025 and a record low of 4821.03100 in January of 2000. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Washington-Arlington-Alexandria, DC-VA-MD-WV (MSA) - last updated from the United States Federal Reserve on June of 2026.