Average GPS coordinates for Onitsha Postcode location: 7.855, 7.946. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Onitsha on map:

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Listing cities & postcodes (1):
>> Benue, 972108 Onitsha, Agatu, GPS coordinates: 7.85537, 7.94580