Average GPS coordinates for Maquoketa Postcode location: 42.078, -90.677. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Maquoketa on map:

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Listing cities & postcodes (1):
>> Iowa, 52060 Maquoketa, Jackson, GPS coordinates: 42.0778,-90.6771