|• Total||0.4 sq mi (1.1 km2)|
|• Land||0.4 sq mi (1.1 km2)|
|• Water||0 sq mi (0 km2)|
|• Density||2,100/sq mi (820/km2)|
|Time zone||UTC-5 (Eastern (EST))|
|• Summer (DST)||UTC-4 (EDT)|
Harwick is a census-designated place within Springdale Township in Allegheny County, Pennsylvania, United States. As of the 2010 census, it had a population of 899.