'Powder River County, MT' definitions:

Powder River -- U.S. County in Montana

From: Gazetteer 2000
Name :
Powder River -- U.S. County in Montana
Population (2000) :
1858
Housing Units (2000) :
1007
Land area (2000) :
3297.177652 sq. miles (8539.650552 sq. km)
Water area (2000) :
0.759052 sq. miles (1.965936 sq. km)
Total area (2000) :
3297.936704 sq. miles (8541.616488 sq. km)
Located within :
Montana (MT), FIPS 30
Location :
45.363372 N, 105.625006 W