Average GPS coordinates for Washington Postcode location: 42.747, -83.033. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Washington on map:

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Listing cities & postcodes (2):
>> Michigan, 48094 Washington, Macomb, GPS coordinates: 42.7262,-83.0268
>> Michigan, 48095 Washington, Macomb, GPS coordinates: 42.7682,-83.0395