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    [County Seal, Montgomery County, Maryland] Origin: Montgomery County was formed by resolve of the Constitutional Convention of 1776 on September 6, 1776 (effective October 1, 1776). Created from Frederick County, Montgomery County was named for Revolutionary War General Richard Montgomery (1738-1775). Born in Swords, County Dublin, Ireland, General Montgomery died leading Continental forces against Quebec.

    Boundaries: Bounded northwest by Frederick County; northeast by Patuxent River; south by Potomac River & District of Columbia.
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    County Seat: Rockville, MD 20850
    Form of Government: Charter since 1948
    Population: 1990 census: 757,027; 2000 census: 873,341; 2010 census: 971,777


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    [photo, Lock 5, Chesapeake & Ohio (C & O) Canal, Potomac, Maryland]

    Lock 5, Chesapeake & Ohio (C & O) Canal, Potomac, Maryland, April 2001. Photo by Ann J. Baker.

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