Average GPS coordinates for Waltham Postcode location: 42.392, -71.274. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Waltham on map:

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Listing cities & postcodes (6):
>> Massachusetts, 02154 Waltham, Middlesex, GPS coordinates: 42.3889,-71.2398
>> Massachusetts, 02254 Waltham, Middlesex, GPS coordinates: 42.4464,-71.4594
>> Massachusetts, 02451 Waltham, Middlesex, GPS coordinates: 42.3986,-71.245
>> Massachusetts, 02452 Waltham, Middlesex, GPS coordinates: 42.3943,-71.218
>> Massachusetts, 02453 Waltham, Middlesex, GPS coordinates: 42.3654,-71.2316
>> Massachusetts, 02454 Waltham, Middlesex, GPS coordinates: 42.3567,-71.2505