Herriottsville is an unincorporated community in South Fayette Township, Allegheny County, Pennsylvania, United States. The community is located in the southeast corner of the township near Chartiers Run. Herriottsville had one of the first post offices in South Fayette Township and was a stagecoach stop on the Black Horse Trail.
- Atlas of the Cities of Pittsburgh, Allegheny, and the Adjoining Boroughs (Map). 1876. p. 39. http://images.library.pitt.edu/cgi-bin/i/image/image-idx?view=entry;cc=maps;entryid=x-76v01p39. Retrieved August 15, 2012.
- "South Fayette History". South Fayette Township School District. Retrieved August 15, 2012.
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