'Northumberland County, VA' definitions:

Northumberland -- U.S. County in Virginia

From: Gazetteer 2000
Name :
Northumberland -- U.S. County in Virginia
Population (2000) :
12259
Housing Units (2000) :
8057
Land area (2000) :
192.302023 sq. miles (498.059931 sq. km)
Water area (2000) :
93.363253 sq. miles (241.809705 sq. km)
Total area (2000) :
285.665276 sq. miles (739.869636 sq. km)
Located within :
Virginia (VA), FIPS 51
Location :
37.867360 N, 76.372080 W