Metropolitan Washington Council of Governments – www.mwcog.org
Greater Washington Board of Trade – www.bot.org
Greater Washington Initiative – www.greaterwashington.org
Greater Washington Research at Brookings – www.brookings.edu/projects/washington.aspx
Metropolitan Washington Airports Authority – www.metwashairports.com
Washington Metropolitan Area Transit Authority – www.wmata.com
MRIS (regional multiple listing service) – www.mris.com
U.S. Census Bureau American FactFinder – factfinder.census.gov
Local counties and cities – www.mwcog.org/about/jurisdiction