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Lawrence
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Locator map of Lawrence County, Pennsylvania. New Castle: Lawrence County Courthouse
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Locator map of Lawrence County, Pennsylvania.

Lawrence

county, Pennsylvania, United States
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

Lawrence, county, western Pennsylvania, U.S., bordered to the west by Ohio. It consists of a hilly region on the Allegheny Plateau that is drained by the Shenango, Mahoning, and Beaver rivers. McConnell’s Mill State Park is located along Slippery Rock Creek. New Castle, the county seat, was connected to Beaver in Beaver county by the Erie Extension Canal (opened 1833). Lawrence county was created in 1849 and named for the Lawrence, Oliver Hazard Perry’s flagship...

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