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is a borough in Westmoreland County, Pennsylvania, United States. The population was 4,138 at the 2000 census.
The community was established in 1899 and was built on land owned by John Y. Woods, a farmer. In creating the name Youngwood, John Y. Woods took his own family name and combined it with his maternal grandfather's name, which was Young (hence Young+Wood).
Youngwood owes its existence to the Southwest Branch of the Pennsylvania Railroad, which ran from Greensburg south to Uniontown and Fairchance. In 1900, a large classification yard was built for sorting railroad cars, and this railroad yard provided Youngwood's economic base for many decades.
Youngwood became a borough on November 10, 1902. The year 1902 was also the date of Youngwood's railroad station, which still stands on Depot Street.