Average GPS coordinates for Watertown Postcode location: 42.421, -71.365. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Watertown on map:

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Listing cities & postcodes (6):
>> Massachusetts, 02172 Watertown, Middlesex, GPS coordinates: 42.3726,-71.178
>> Massachusetts, 02272 Watertown, Middlesex, GPS coordinates: 42.4464,-71.4594
>> Massachusetts, 02277 Watertown, Middlesex, GPS coordinates: 42.4464,-71.4594
>> Massachusetts, 02471 Watertown, Middlesex, GPS coordinates: 42.4464,-71.4594
>> Massachusetts, 02472 Watertown, Middlesex, GPS coordinates: 42.37,-71.1773
>> Massachusetts, 02477 Watertown, Middlesex, GPS coordinates: 42.4464,-71.4594