Baltimore metropolitan area
The Baltimore–Columbia–Towson Metropolitan Statistical Area, also known as Central Maryland, is a Metropolitan Statistical Area (MSA) in Maryland as defined by the United States Office of Management and Budget (OMB). As of the 2010 Census, the combined population of the seven counties is 2,710,489. The MSA has the fourth-highest median household income in the United States, at $66,970 in 2012. Composition. The area includes the following counties: Principal communities. The metropolitan area includes the following principal communities: It also includes several other communities (not necessarily incorporated as cities or towns): In addition to  its technical metropolitan area, Baltimore also receives a large number of commuters from cities such as York, Pennsylvania and the Washington Metropolitan Area. Companies in metropolitan Baltimore. Four Fortune 1000 companies are headquartered in Greater Baltimore: Grace Chemicals (in Columbia), Legg Mason, T. Rowe Price, and McCormick & Company (in Hunt Valley). Other companies headquartered in Greater Baltimore include AAI Corporation (in Hunt Valley), Adams Express Company, Brown Advisory, Alex Brown, First Home Mortgage Corporation, FTI Consulting, Petroleum & Resources Corporation, Vertis, Prometric, Sylvan Learning, Laureate Education, Under Armour, DAP, 180s, DeBaufre Bakeries, Wm. T. Burnett & Co, Old Mutual Financial Network, Firaxis  Games (in Sparks), Sinclair Broadcast Group (in Hunt Valley), and Fila USA (in Sparks). Government and infrastructure. The capital of Maryland and the agencies of the Maryland state government are located in the Baltimore MSA, mainly in Annapolis and Baltimore City. The area is also home to the National Security Agency (NSA) headquarters in Fort Meade in Anne Arundel County, as well as the Social Security Administration and the Centers for Medicare & Medicaid Services (CMS) in Woodlawn in Baltimore County. Sports teams in metropolitan Baltimore. In Baltimore County: In Anne Arundel County: