Average GPS coordinates for San Pedro Postcode location: 29.958, -110.15. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Pedro on map:

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Listing cities & postcodes (2):
>> Sonora, 84183 San Pedro, Naco, GPS coordinates: 30.4833,-109.95
>> Sonora, 84900 San Pedro, Ures, GPS coordinates: 29.4333,-110.35