'Nantucket County, MA' definitions:

Nantucket -- U.S. County in Massachusetts

From: Gazetteer 2000
Name :
Nantucket -- U.S. County in Massachusetts
Population (2000) :
9520
Housing Units (2000) :
9210
Land area (2000) :
47.809817 sq. miles (123.826853 sq. km)
Water area (2000) :
255.828135 sq. miles (662.591799 sq. km)
Total area (2000) :
303.637952 sq. miles (786.418652 sq. km)
Located within :
Massachusetts (MA), FIPS 25
Location :
41.276758 N, 70.090890 W