Average GPS coordinates for Westport Postcode location: 45.671, -98.58. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Westport on map:

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Listing cities & postcodes (1):
>> South Dakota, 57481 Westport, Brown, GPS coordinates: 45.6705,-98.5802