Average GPS coordinates for San Juan Postcode location: 26.204, -98.154. (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 (1):
>> Texas, 78589 San Juan, Hidalgo, GPS coordinates: 26.2044,-98.1537