Average GPS coordinates for Potosi Postcode location: 42.688, -90.7. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Potosi on map:

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Listing cities & postcodes (1):
>> Wisconsin, 53820 Potosi, Grant, GPS coordinates: 42.6884,-90.7002