Average GPS coordinates for La Union Postcode location: 17.2, -100.022. (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 (3):
>> Guerrero, 39208 La Union, Ayutla de los Libres, GPS coordinates: 16.8167,-99.125
>> Guerrero, 40406 La Union, Teloloapan, GPS coordinates: 16.8167,-99.125
>> Guerrero, 40730 La Union, Ajuchitlan Del Progreso, GPS coordinates: 17.9667,-101.8167