York County, Pennsylvania

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York County is a county in the U.S. state of Pennsylvania. As of 2010, the population was 434,972. It is in the Susquehanna Valley, a large fertile agricultural region in South Central Pennsylvania.York County was created on August 19, 1749, from part of Lancaster County and named either for the Duke of York, an early patron of the Penn family, or for the city and shire of York in England. Its county seat is the city of York.

Formed August 9, 1749; named for the House of York, England. An agricultural region of great fertility. First authorized settlements were made in 1733. Before the white settlers came, the territory west of the Susquehanna River was hunting ground for the Conestoga Indians, a branch of the Mohawks, who migrated to New York State about 1750; also for the Susquehannocks and Conewagos, who had their village at present site of York Haven.

www.york-county.org/
www.yorkpa.org/
www.livingplaces.com/PA/York_County.html
www.yorkheritage.org/
ydr.inyork.com/history/