Average GPS coordinates for Martindale Postcode location: 29.839, -97.851. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Martindale on map:

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Listing cities & postcodes (1):
>> Texas, 78655 Martindale, Caldwell, GPS coordinates: 29.8394,-97.8508