Average GPS coordinates for Monson Postcode location: 42.101, -72.32. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Monson on map:

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Listing cities & postcodes (1):
>> Massachusetts, 01057 Monson, Hampden, GPS coordinates: 42.101,-72.3196