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The name of the county was derived from the barony of the Proprietor of the Maryland colony, Cæcilius Calvert,
2nd Baron Baltimore, in County Longford, Ireland. The County Seat is Towson.
It should be noted that Baltimore County does not include the City of Baltimore, which was split off as an independent
city in 1851.
The origin of Baltimore County is not known, the earliest known recordof the county politically is January 12,
1659, when a writ was issued to its sheriff. Previously, Baltimore Countywas more known as a geographical entity
than a political one, with its territorial limits consisting of the presentday Baltimore City, Cecil and Harford
Counties, as well as parts of Carroll, Anne Arundel, Frederick, Howard and Kent Counties.
In 1674, a portion of Baltimore County, as well as a portion of Kent County, was split off to form Cecil County.In
1748, a portion of Baltimore County, as well as a portion of Prince George's County, was split off to form FrederickCounty.
In 1773, Harford County was split off from Baltimore County. In 1837, a part of Baltimore County was combined with
a part of Frederick County to form Carroll County. In 1851 the city of Baltimore was detached from Baltimore County.
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