Montgomery County is a county in the U.S. state of Maryland, situated just to the north of Washington, D.C., and southwest of the city of Baltimore. It is one of the most affluent counties in the United States, and has the highest percentage of residents over 25 years of age who hold post-graduate degrees. The county seat and largest municipality is Rockville. As of 2010 the population was 971,777. Most of the county's residents live in unincorporated locales, the most populous of which are Silver Spring, Germantown and Bethesda, though the incorporated cities of Rockville and Gaithersburg... are also large population centers. It is a part of both the Washington Metropolitan Area and the Baltimore-Washington Metropolitan Area. In 2008, Montgomery County was the second richest county in terms of per capita income in the state of Maryland and 13th richest in the United States, with a median household income of $92,213. Montgomery County is an important business and research center. It is the epicenter for biotechnology in the Mid-Atlantic region.
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| Founded: | 1776 |
| State: | Maryland |
| Population: | 976,203 |
| Area: | 507 sq. mi. |
| Time zone: | North American Eastern Time Zone |
| Also known as: | Montgomery County, Maryland |