Average GPS coordinates for San Marcos Postcode location: 24.76, -99.892. (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):
>> Nuevo Leon, 67277 San Marcos, Juarez, Benito Juarez, GPS coordinates: 24.8203,-99.7164
>> Nuevo Leon, 67878 San Marcos, Galeana, GPS coordinates: 24.7,-100.0667