'Essex County' definitions:

Essex -- U.S. County in Massachusetts

From: Gazetteer 2000
Name :
Essex -- U.S. County in Massachusetts
Population (2000) :
723419
Housing Units (2000) :
287144
Land area (2000) :
500.667108 sq. miles (1296.721801 sq. km)
Water area (2000) :
327.859826 sq. miles (849.153015 sq. km)
Total area (2000) :
828.526934 sq. miles (2145.874816 sq. km)
Located within :
Massachusetts (MA), FIPS 25
Location :
42.635475 N, 70.970827 W

Essex -- U.S. County in New Jersey

From: Gazetteer 2000
Name :
Essex -- U.S. County in New Jersey
Population (2000) :
793633
Housing Units (2000) :
301011
Land area (2000) :
126.266855 sq. miles (327.029640 sq. km)
Water area (2000) :
3.292975 sq. miles (8.528767 sq. km)
Total area (2000) :
129.559830 sq. miles (335.558407 sq. km)
Located within :
New Jersey (NJ), FIPS 34
Location :
40.773050 N, 74.223065 W

Essex -- U.S. County in New York

From: Gazetteer 2000
Name :
Essex -- U.S. County in New York
Population (2000) :
38851
Housing Units (2000) :
23115
Land area (2000) :
1796.801326 sq. miles (4653.693874 sq. km)
Water area (2000) :
119.699818 sq. miles (310.021093 sq. km)
Total area (2000) :
1916.501144 sq. miles (4963.714967 sq. km)
Located within :
New York (NY), FIPS 36
Location :
44.162194 N, 73.737594 W

Essex -- U.S. County in Vermont

From: Gazetteer 2000
Name :
Essex -- U.S. County in Vermont
Population (2000) :
6459
Housing Units (2000) :
4762
Land area (2000) :
665.196848 sq. miles (1722.851853 sq. km)
Water area (2000) :
8.555183 sq. miles (22.157822 sq. km)
Total area (2000) :
673.752031 sq. miles (1745.009675 sq. km)
Located within :
Vermont (VT), FIPS 50
Location :
44.720892 N, 71.745018 W

Essex -- U.S. County in Virginia

From: Gazetteer 2000
Name :
Essex -- U.S. County in Virginia
Population (2000) :
9989
Housing Units (2000) :
4926
Land area (2000) :
257.765502 sq. miles (667.609556 sq. km)
Water area (2000) :
28.142187 sq. miles (72.887926 sq. km)
Total area (2000) :
285.907689 sq. miles (740.497482 sq. km)
Located within :
Virginia (VA), FIPS 51
Location :
37.916172 N, 76.906565 W