Maryland Manual On-Line -


[County Seal, Montgomery County, Maryland] Origin: Created from Frederick County by resolve of the Constitutional Convention of 1776, 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.

County Code
County Executives
County Seat: Rockville, MD 20850
Form of Government: Charter since 1948

1990 census: 757,027
2000 census: 873,341

[photo, Lock 5, Chesapeake & Ohio (C & O) Canal, Potomac, Maryland]
  • Creeks
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  • Washington Metrorail Map (Washington metropolitan area)
  • Lock 5, Chesapeake & Ohio (C & O) Canal, Potomac, Maryland, April 2001. Photo by Ann J. Baker.


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     Maryland Manual On-Line, 2007

    July 6, 2007   
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