Average GPS coordinates for East Haddam Postcode location: 41.47, -72.406. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). East Haddam on map:

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Listing cities & postcodes (1):
>> Connecticut, 06423 East Haddam, Middlesex, GPS coordinates: 41.4696,-72.4059