Average GPS coordinates for Casper Postcode location: 42.874, -106.43. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Casper on map:

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Listing cities & postcodes (5):
>> Wyoming, 82601 Casper, Natrona, GPS coordinates: 42.8458,-106.3166
>> Wyoming, 82602 Casper, Natrona, GPS coordinates: 42.8896,-106.357
>> Wyoming, 82604 Casper, Natrona, GPS coordinates: 42.8261,-106.3896
>> Wyoming, 82605 Casper, Natrona, GPS coordinates: 42.9662,-106.807
>> Wyoming, 82609 Casper, Natrona, GPS coordinates: 42.8406,-106.2806