'San Francisco County' definitions:
San Francisco -- U.S. County in California
From: Gazetteer 2000
Name :
San Francisco -- U.S. County in California
Population (2000) :
776733
Housing Units (2000) :
346527
Land area (2000) :
46.694466 sq. miles (120.938107 sq. km)
Water area (2000) :
185.222304 sq. miles (479.723545 sq. km)
Total area (2000) :
231.916770 sq. miles (600.661652 sq. km)
Located within :
California (CA), FIPS 06
Location :
37.759881 N, 122.437392 W