'Tri' definitions:

Tri-City, OR -- U.S. Census Designated Place in Oregon

From: Gazetteer 2000
Name :
Tri-City, OR -- U.S. Census Designated Place in Oregon
Population (2000) :
3519
Housing Units (2000) :
1409
Land area (2000) :
7.566289 sq. miles (19.596599 sq. km)
Water area (2000) :
0.000000 sq. miles (0.000000 sq. km)
Total area (2000) :
7.566289 sq. miles (19.596599 sq. km)
FIPS code :
74650
Located within :
Oregon (OR), FIPS 41
Location :
42.991481 N, 123.312353 W
Note :
some ZIP codes may be omitted esp. for suburbs.

Tri-Lakes, IN -- U.S. Census Designated Place in Indiana

From: Gazetteer 2000
Name :
Tri-Lakes, IN -- U.S. Census Designated Place in Indiana
Population (2000) :
3925
Housing Units (2000) :
1652
Land area (2000) :
35.160049 sq. miles (91.064104 sq. km)
Water area (2000) :
0.897983 sq. miles (2.325765 sq. km)
Total area (2000) :
36.058032 sq. miles (93.389869 sq. km)
FIPS code :
76526
Located within :
Indiana (IN), FIPS 18
Location :
41.229009 N, 85.472531 W
Note :
some ZIP codes may be omitted esp. for suburbs.