Average GPS coordinates for Fairfax Postcode location: 41.915, -91.78. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Fairfax on map:

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Listing cities & postcodes (1):
>> Iowa, 52228 Fairfax, Linn, GPS coordinates: 41.9153,-91.7801