Average GPS coordinates for San Marcos Postcode location: 20.178, -103.733. (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):
>> Jalisco, 44330 San Marcos, Guadalajara, Guadalajara, GPS coordinates: 20.3333,-103.55
>> Jalisco, 46540 San Marcos, San Marcos, GPS coordinates: 20.7833,-104.1833
>> Jalisco, 49850 San Marcos, Tonila, GPS coordinates: 19.4167,-103.4667