Average GPS coordinates for San Mateo Postcode location: -12.381, -76.131. (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 (3):
>> Lima, 15561 San Mateo, Huarochirí, GPS coordinates: -11.76725, -76.32231
>> Lima, 15736 San Mateo, Yauyos, GPS coordinates: -12.91411, -75.84098
>> Lima, 15680 San Mateo, Yauyos, GPS coordinates: -12.46014, -76.22898