Average GPS coordinates for Spearfish Postcode location: 44.495, -103.868. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Spearfish on map:

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Listing cities & postcodes (2):
>> South Dakota, 57783 Spearfish, Lawrence, GPS coordinates: 44.4946,-103.865
>> South Dakota, 57799 Spearfish, Lawrence, GPS coordinates: 44.4958,-103.8703