'Jefferson, LA' definitions:

Jefferson, LA -- U.S. Census Designated Place in Louisiana

From: Gazetteer 2000
Name :
Jefferson, LA -- U.S. Census Designated Place in Louisiana
Population (2000) :
11843
Housing Units (2000) :
5816
Land area (2000) :
2.758054 sq. miles (7.143326 sq. km)
Water area (2000) :
0.529231 sq. miles (1.370702 sq. km)
Total area (2000) :
3.287285 sq. miles (8.514028 sq. km)
FIPS code :
38145
Located within :
Louisiana (LA), FIPS 22
Location :
29.964132 N, 90.157170 W
ZIP Codes (1990) :
70121
Note :
some ZIP codes may be omitted esp. for suburbs.

Jefferson -- U.S. Parish in Louisiana

From: Gazetteer 2000
Name :
Jefferson -- U.S. Parish in Louisiana
Population (2000) :
455466
Housing Units (2000) :
187907
Land area (2000) :
306.517077 sq. miles (793.875552 sq. km)
Water area (2000) :
335.891857 sq. miles (869.955879 sq. km)
Total area (2000) :
642.408934 sq. miles (1663.831431 sq. km)
Located within :
Louisiana (LA), FIPS 22
Location :
29.935238 N, 90.151400 W