Nigeria Police has 15 ranks, namely:

1. Inspector-General of Police (IGP)
2. Deputy Inspector-General of Police (DIG)
3. Assistant Inspector-General of Police (AIG)
4. Commissioner of Police (CP)
5. Deputy Commissioner of Police (DCP)
6. Assistant Commissioner of Police (ACP)
7. Chief Superintendent of Police (CSP)
8. Superintendent of Police (SP)
9. Deputy Superintendent of Police (DSP)
10. Assistant Superintendent of Police (ASP)
11. Inspector of Police (IP)
12. Sergent Major (SM)
13. Sergent
14. Corporal
15. Constable

Police ranks in Nigeria, from bottom to top:

1. Constable
2. Corporal
3. Sergent
4. Sergent Major (SM)
5. Inspector of Police (IP)
6. Assistant Superintendent of Police (ASP)
7. Deputy Superintendent of Police (DSP)
8. Superintendent of Police (SP)
9. Chief Superintendent of Police (CSP)
10. Assistant Commissioner of Police (ACP)
11. Deputy Commissioner of Police (DCP)
12. Commissioner of Police (CP)
13. Assistant Inspector-General of Police (AIG)
14. Deputy Inspector-General of Police (DIG)
15. Inspector-General of Police (IGP)

Symbols of police ranks in Nigeria:

Section 4 of the Police Acts and Regulations lists the duties of the police force to include:

·  The prevention and detection of crime.

·  The apprehension of offenders.

·  The preservation of law and order.

·  The protection of life and property.

·  The due enforcement of laws and regulations with which they are directly charged.

·  The performance of such military duties within and outside Nigeria as may be required of them by or under the authority of the police act or any other act.