Harrison Island is private farming island in Montgomery County

Montgomery County, Maryland

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...

, Maryland

Maryland

Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...

, United States. It is located between the Potomac River

Potomac River

The Potomac River flows into the Chesapeake Bay, located along the mid-Atlantic coast of the United States. The river is approximately long, with a drainage area of about 14,700 square miles...

 on the Maryland side, and Ball's Bluff Battlefield and National Cemetery

Ball's Bluff Battlefield and National Cemetery

Ball's Bluff Battlefield Regional Park and National Cemetery is a battlefield area and an United States National Cemetery, located northeast of Leesburg, Virginia. The cemetery is the third smallest national cemetery in the United States...

 on the Virginia side, next to Leesburg, Virginia

Leesburg, Virginia

Leesburg is a historic town in, and county seat of, Loudoun County, Virginia, United States of America. Leesburg is located west-northwest of Washington, D.C. along the base of the Catoctin Mountain and adjacent to the Potomac River. Its population according the 2010 Census is 42,616...

. The island dominates the view from the heights of Ball's Bluff Battlefield. Among the low, flood-prone islands of the lower Potomac River, Harrison Island is notable for having a permanent private residence visible near the center of the island. There are no bridges to the island. Harrison Island belongs administratively to Poolesville, Maryland

Poolesville, Maryland

Poolesville is a town in Montgomery County, Maryland United States with a population of approximately 5000 people. It is surrounded by the Montgomery County Agricultural Reserve, and is considered a distant bedroom community for commuters to Washington, DC.The name of the town comes from the...

.