Average GPS coordinates for San Diego Postcode location: 21.917, -100.1. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Diego on map:

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Listing cities & postcodes (2):
>> San Luis Potosi, 79421 San Diego, Cerritos, GPS coordinates: 21.9167,-100.1
>> San Luis Potosi, 79604 San Diego, Rioverde, GPS coordinates: 21.9167,-100.1