Blackrock is an unincorporated community in York County, Pennsylvania, United States. Blackrock is located near the Mason–Dixon line approx. 1 mile northwest of the town of Lineboro.
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| Boroughs |
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| Townships |
- Carroll
- Chanceford
- Codorus
- Conewago
- Dover
- East Hopewell
- East Manchester
- Fairview
- Fawn
- Franklin
- Heidelberg
- Hellam
- Hopewell
- Jackson
- Lower Chanceford
- Lower Windsor
- Manchester
- Manheim
- Monaghan
- Newberry
- North Codorus
- North Hopewell
- Paradise
- Peach Bottom
- Penn
- Shrewsbury
- Spring Garden
- Springettsbury
- Springfield
- Warrington
- Washington
- West Manchester
- West Manheim
- Windsor
- York
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Unincorporated
communities |
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