Average GPS coordinates for San Diego Postcode location: 16.563, -96.639. (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):
>> Oaxaca, 69005 San Diego, Heroica Ciudad de Huajuapan de Leon, Huajuapan de Leon, GPS coordinates: 16.5625,-96.6386
>> Oaxaca, 69800 San Diego, Heroica Ciudad de Tlaxiaco, Heroica Ciudad de Tlaxiaco, GPS coordinates: 16.5625,-96.6386