Average GPS coordinates for Greenwich Postcode location: 41.179, -73.503. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Greenwich on map:

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Listing cities & postcodes (4):
>> Connecticut, 06830 Greenwich, Fairfield, GPS coordinates: 41.0427,-73.6262
>> Connecticut, 06831 Greenwich, Fairfield, GPS coordinates: 41.0549,-73.6594
>> Connecticut, 06832 Greenwich, Fairfield, GPS coordinates: 41.3089,-73.3637
>> Connecticut, 06836 Greenwich, Fairfield, GPS coordinates: 41.3089,-73.3637