Average GPS coordinates for Johnstown Postcode location: 42.466, -99.931. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Johnstown on map:

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Listing cities & postcodes (1):
>> Nebraska, 69214 Johnstown, Brown, GPS coordinates: 42.4657,-99.9305