Average GPS coordinates for Jenison Postcode location: 42.948, -86.136. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Jenison on map:

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Listing cities & postcodes (2):
>> Michigan, 49428 Jenison, Ottawa, GPS coordinates: 42.9104,-85.8276
>> Michigan, 49429 Jenison, Ottawa, GPS coordinates: 42.9856,-86.4448