Average GPS coordinates for Edgemont Postcode location: 43.287, -103.811. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Edgemont on map:

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Listing cities & postcodes (1):
>> South Dakota, 57735 Edgemont, Fall River, GPS coordinates: 43.2874,-103.811