Nigeria Police has 15 ranks with 4 entry levels. The entry levels into the Nigeria Police are:
- Constable
- Cadet Inspector
- Cadet Assistant Superintendent of Police
- Nigeria Police Academy degree programme
Police ranks in Nigeria, from top to bottom:
- Inspector-General of Police (IGP)
- Deputy Inspector-General of Police (DIG)
- Assistant Inspector-General of Police (AIG)
- Commissioner of Police (CP)
- Deputy Commissioner of Police (DCP)
- Assistant Commissioner of Police (ACP)
- Chief Superintendent of Police (CSP)
- Superintendent of Police (SP)
- Deputy Superintendent of Police (DSP)
- Assistant Superintendent of Police (ASP)
- Inspector of Police (IP)
- Sergent Major (SM)
- Sergent
- Corporal
- Constable
Police ranks in Nigeria, from bottom to top:
- Constable
- Corporal
- Sergent
- Sergent Major (SM)
- Inspector of Police (IP)
- Assistant Superintendent of Police (ASP)
- Deputy Superintendent of Police (DSP)
- Superintendent of Police (SP)
- Chief Superintendent of Police (CSP)
- Assistant Commissioner of Police (ACP)
- Deputy Commissioner of Police (DCP)
- Commissioner of Police (CP)
- Assistant Inspector-General of Police (AIG)
- Deputy Inspector-General of Police (DIG)
- Inspector-General of Police (IGP)
Symbols of police ranks in Nigeria:
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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.