Average GPS coordinates for Kennebec Postcode location: 43.892, -99.85. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Kennebec on map:

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Listing cities & postcodes (1):
>> South Dakota, 57544 Kennebec, Lyman, GPS coordinates: 43.8921,-99.8502