'St. Mary' definitions:

St. Mary, MO -- U.S. city in Missouri

From: Gazetteer 2000
Name :
St. Mary, MO -- U.S. city in Missouri
Population (2000) :
377
Housing Units (2000) :
187
Land area (2000) :
0.602899 sq. miles (1.561500 sq. km)
Water area (2000) :
0.000000 sq. miles (0.000000 sq. km)
Total area (2000) :
0.602899 sq. miles (1.561500 sq. km)
FIPS code :
65034
Located within :
Missouri (MO), FIPS 29
Location :
37.876153 N, 89.948811 W
Note :
some ZIP codes may be omitted esp. for suburbs.

St. Mary -- U.S. Parish in Louisiana

From: Gazetteer 2000
Name :
St. Mary -- U.S. Parish in Louisiana
Population (2000) :
53500
Housing Units (2000) :
21650
Land area (2000) :
612.794894 sq. miles (1587.131422 sq. km)
Water area (2000) :
506.038009 sq. miles (1310.632371 sq. km)
Total area (2000) :
1118.832903 sq. miles (2897.763793 sq. km)
Located within :
Louisiana (LA), FIPS 22
Location :
29.742426 N, 91.367184 W