Average GPS coordinates for La Union Postcode location: 25.333, -108.183. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). La Union on map:

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Listing cities & postcodes (1):
>> Sinaloa, 81632 La Union, Angostura, GPS coordinates: 25.3333,-108.1833