'Worcester County, MA' definitions:

Worcester -- U.S. County in Massachusetts

From: Gazetteer 2000
Name :
Worcester -- U.S. County in Massachusetts
Population (2000) :
750963
Housing Units (2000) :
298159
Land area (2000) :
1513.063932 sq. miles (3918.817426 sq. km)
Water area (2000) :
65.954850 sq. miles (170.822271 sq. km)
Total area (2000) :
1579.018782 sq. miles (4089.639697 sq. km)
Located within :
Massachusetts (MA), FIPS 25
Location :
42.329642 N, 71.840209 W