Average GPS coordinates for Monticello Postcode location: 42.742, -89.608. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Monticello on map:

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Listing cities & postcodes (1):
>> Wisconsin, 53570 Monticello, Green, GPS coordinates: 42.7415,-89.6081