Derry Township, Westmoreland County, Pennsylvania
Township
Keystone State Park is in Derry Township
Map of Westmoreland County, Pennsylvania Highlighting Derry Township
Map of Pennsylvania highlighting Westmoreland County
Country	United States
State	Pennsylvania
County	Westmoreland
Settled	1763
Incorporated	1775
Named for	Derry
Area
• Total	97.4 sq mi (252 km2)
• Land	95.8 sq mi (248 km2)
• Water	1.6 sq mi (4 km2)
Population (2000)
• Total	14,726
• Density	153.6/sq mi (59.3/km2)
Time zone	Eastern (EST) (UTC-5)
• Summer (DST)	EDT (UTC-4)
Website	http://www.derrytownship.com