Average GPS coordinates for San Mateo Postcode location: -2.772, -71.258. (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):
>> Loreto, 16220 San Mateo, Mariscal Ramón Castilla, GPS coordinates: -3.25630, -71.74625
>> Loreto, 16350 San Mateo, Requena, GPS coordinates: -2.28722, -70.77037