Average GPS coordinates for Windham Postcode location: 42.805, -71.307. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Windham on map:

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Listing cities & postcodes (1):
>> New Hampshire, 03087 Windham, Rockingham, GPS coordinates: 42.8051,-71.3067