Average GPS coordinates for De Soto Postcode location: 37.815, -89.222. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). De Soto on map:

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Listing cities & postcodes (1):
>> Illinois, 62924 De Soto, Jackson, GPS coordinates: 37.8147,-89.2218