Average GPS coordinates for Chestertown Postcode location: 43.645, -73.807. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Chestertown on map:

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Listing cities & postcodes (1):
>> New York, 12817 Chestertown, Warren, GPS coordinates: 43.6451,-73.8066