What is "st. marks"

Population (2000): 272
Housing Units (2000): 168
Land area (2000): 1.929331 sq. miles (4.996943 sq. km)
Water area (2000): 0.012846 sq. miles (0.033272 sq. km)
Total area (2000): 1.942177 sq. miles (5.030215 sq. km)
FIPS code: 62825
Located within: Florida (FL), FIPS 12
Location: 30.159244 N, 84.207152 W
ZIP Codes (1990):
Note: some ZIP codes may be omitted esp. for suburbs.
Headwords: