Below is the list of all postal/zip codes of all states in Nigeria.
- Abia – 440001
- Adamawa – 640001
- Anambra – 420001
- Akwa Ibom – 520001
- Bauchi – 740001
- Bayelsa – 560001
- Benue – 970001
- Borno – 600001
- Cross River – 540003
- Delta – 320001
- Ebonyi – 840001
- Enugu – 400001
- Edo – 300001
- Ekiti – 360001
- Gombe – 760001
- Imo – 460001
- Jigawa – 720001
- Kaduna – 800001
- Kano – 700001
- Katsina – 820001
- Kebbi – 860001
- Kogi – 260001
- Kwara – 240001
- Lagos (Island) – 101001
- Lagos (Mainland) – 100001
- Nasarawa – 950001
- Niger – 920001
- Ogun – 110001
- Ondo – 340001
- Osun – 230001
- Oyo – 200001
- Plateau – 930001
- Rivers – 500001
- Sokoto – 840001
- Taraba – 660001
- Yobe – 320001
- Zamfara – 880001
Source: http://nigeriapostalzipcodes.com.ng/postal-codes-nigeria-states/