'Marin County, CA' definitions:

Marin -- U.S. County in California

From: Gazetteer 2000
Name :
Marin -- U.S. County in California
Population (2000) :
247289
Housing Units (2000) :
104990
Land area (2000) :
519.802977 sq. miles (1346.283474 sq. km)
Water area (2000) :
308.392062 sq. miles (798.731740 sq. km)
Total area (2000) :
828.195039 sq. miles (2145.015214 sq. km)
Located within :
California (CA), FIPS 06
Location :
37.985723 N, 122.575951 W