'Lake San Marcos, CA' definitions:

Lake San Marcos, CA -- U.S. Census Designated Place in California

From: Gazetteer 2000
Name :
Lake San Marcos, CA -- U.S. Census Designated Place in California
Population (2000) :
4138
Housing Units (2000) :
2455
Land area (2000) :
1.812227 sq. miles (4.693646 sq. km)
Water area (2000) :
0.158114 sq. miles (0.409514 sq. km)
Total area (2000) :
1.970341 sq. miles (5.103160 sq. km)
FIPS code :
39724
Located within :
California (CA), FIPS 06
Location :
33.122562 N, 117.209411 W
Note :
some ZIP codes may be omitted esp. for suburbs.