Average GPS coordinates for San Mateo Postcode location: 22.325, -99.525. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Mateo on map:

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Listing cities & postcodes (2):
>> San Luis Potosi, 78531 San Mateo, Cedral, GPS coordinates: 22.6,-99.9167
>> San Luis Potosi, 79245 San Mateo, Ciudad Valles, GPS coordinates: 22.05,-99.1333