Average GPS coordinates for San Marcos Postcode location: 15.883, -93.717. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Marcos on map:

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Listing cities & postcodes (3):
>> Coahuila De Zaragoza, 25724 San Marcos, Monclova, Monclova, GPS coordinates: 15.8833,-93.7167
>> Coahuila De Zaragoza, 27040 San Marcos, Torreon, Torreon, GPS coordinates: 15.8833,-93.7167
>> Coahuila De Zaragoza, 27970 San Marcos, San Pedro, GPS coordinates: 15.8833,-93.7167