Average GPS coordinates for San Juan Postcode location: -12.513, -76.312. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Juan on map:

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Listing cities & postcodes (4):
>> Lima, 15700 San Juan, Cañete, GPS coordinates: -13.11527, -76.37623
>> Lima, 15735 San Juan, Cañete, GPS coordinates: -12.86293, -76.02927
>> Lima, 15135 San Juan, Huaura, GPS coordinates: -12.85583, -75.60750
>> Lima, 15240 San Juan, Huaura, GPS coordinates: -11.21892, -77.23648