Average GPS coordinates for Williamtown Postcode location: -32.817, 151.85. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Williamtown on map:

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Listing cities & postcodes (1):
>> New South Wales, 2318 Williamtown, HUNTER, GPS coordinates: -32.8167,151.85