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U.S. ZIP Code 78666
5-digit United States postal code #78666, San Marcos, TX
ZIP code 78666 is located in the city (place name) San Marcos, сounty Guadalupe in the state of Texas. The population in ZIP code 78666 is 63836 and the population density is 139.6. ZIP code 78666 refers to сounty Guadalupe having сounty FIPS 48187, the ratio of people from different counties in this ZIP code is as follows: all county weights - 48055: 3.24%, 48091: 0.02%, 48187: 9.58%, 48209: 87.17%. In the area of the ZIP code 78666 valid time zone America/Chicago.
ZIP: 78666
County: Guadalupe
Place Name: San Marcos
State: Texas
State Abbreviation: TX
Coordinates: 29° 52' 46.488" N, 97° 57' 59.112" W
Latitude: 29.879580000000
Longitude: -97.966420000000
Population: 63836
Density: 139.6/km2
Time zone: America/Chicago
County FIPS: 48187
All county weights: 48055: 3.24%, 48091: 0.02%, 48187: 9.58%, 48209: 87.17%