Average GPS coordinates for San Marcos Postcode location: 24.485, -98.836. (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 (2):
>> Tamaulipas, 87070 San Marcos, Victoria, Ciudad Victoria, GPS coordinates: 24.5167,-99.1
>> Tamaulipas, 87150 San Marcos, Victoria, Ciudad Victoria, GPS coordinates: 24.4523,-98.5711