States of Nigeria

==Chronology==
{|class="wikitable" style="text-align:left" 
|-
!colspan=2|Regions
!colspan=5|States 
|-
|style="width:6em"|'''1960''' 
|style="width:6em"|'''1963''' 
|style="width:6em"|'''1967''' 
|style="width:6em"|'''1976''' 
|style="width:6em"|'''1987''' 
|style="width:6em"|'''1991''' 
|'''1996'''
|-
|rowspan=10 colspan=2|[[Eastern Region, Nigeria|Eastern]]
|rowspan=2 colspan=1|[[South-Eastern State, Nigeria|South-Eastern]]
|rowspan=2 colspan=1|[[Cross River State|Cross River]]
|colspan=3|[[Akwa Ibom State|Akwa Ibom]]
|-
|colspan=3|[[Cross River State|Cross River]]
|-
|rowspan=6|[[East Central State, Nigeria|East Central]]
|rowspan=3 colspan=2|[[Imo State|Imo]]
|colspan=2|[[Imo State|Imo]]
|-
|colspan=2|[[Abia State|Abia]]
|-
|rowspan=2|[[Ebonyi State|Ebonyi]]
|-
|rowspan=3 colspan=2|[[Anambra State|Anambra]]
|rowspan=2|[[Enugu State|Enugu]]
|-
|[[Enugu State|Enugu]]
|-
|colspan=2|[[Anambra State|Anambra]]
|-
|rowspan=2 colspan=4|[[Rivers State|Rivers]]
|[[Bayelsa State|Bayelsa]]
|-
|[[Rivers State|Rivers]]
|-
|rowspan=8|[[Western Region, Nigeria|Western]]
|rowspan=2 colspan=2 |[[Mid-Western Region, Nigeria|Mid-Western]]
|rowspan=2 colspan=2 |[[Bendel State|Bendel]]
|colspan=2|[[Delta State|Delta]]
|-
|colspan=2|[[Edo State|Edo]]
|-
|rowspan=6|[[Western Region, Nigeria|Western]]
|colspan=5|[[Lagos State|Lagos]]
|-
|rowspan=5|[[Western Region, Nigeria|Western]]
|colspan=4|[[Ogun State|Ogun]]
|-
|rowspan=2 colspan=3|[[Ondo State|Ondo]]
|[[Ekiti State|Ekiti]]
|-
|[[Ondo State|Ondo]]
|-
|rowspan=2 colspan=2|[[Oyo State|Oyo]]
|colspan=2|[[Osun State|Osun]]
|-
|colspan=2|[[Oyo State|Oyo]]
|-
|rowspan=20 colspan=2|[[Northern Region, Nigeria|Northern]]
|rowspan=4|[[Benue-Plateau State|Benue-Plateau]]
|rowspan=2 colspan=3|[[Plateau State|Plateau]]
|[[Nasarawa State|Nasarawa]]
|-
|[[Plateau State|Plateau]]
|-
|rowspan=2 colspan=2|[[Benue State|Benue]]
|colspan=2|[[Benue State|Benue]]
|-
|colspan=2 rowspan=2|[[Kogi State|Kogi]]
|-
|rowspan=2 colspan=3|[[Kwara State|Kwara]]
|-
|colspan=2 |[[Kwara State|Kwara]]
|-
|rowspan=2 colspan=3|[[Kano State|Kano]]
|colspan=2|[[Jigawa State|Jigawa]]
|-
|colspan=2|[[Kano State|Kano]]
|-
|rowspan=2|[[Kaduna State|North Central]]
|rowspan=2 colspan=1|[[Kaduna State|Kaduna]]
|colspan=3|[[Kaduna State|Kaduna]]
|-
|colspan=3|[[Katsina State|Katsina]]
|-
|rowspan=4|[[North-Western State|North Western]]
|colspan=4|[[Niger State|Niger]]
|-
|rowspan=3 colspan=2|[[Sokoto State|Sokoto]]
|colspan=2|[[Kebbi State|Kebbi]]
|-
|rowspan=2|[[Sokoto State|Sokoto]]
|[[Sokoto State|Sokoto]]
|-
|[[Zamfara State|Zamfara]]
|-
|rowspan=6|[[North-Eastern State|North Eastern]]
|rowspan=2 colspan=3|[[Bauchi State|Bauchi]]
|[[Bauchi State|Bauchi]]
|-
|[[Gombe State|Gombe]]
|-
|rowspan=2 colspan=2|[[Borno State|Borno]]
|colspan=2|[[Borno State|Borno]]
|-
|colspan=2|[[Yobe State|Yobe]]
|-
|rowspan=2 colspan=2|[[Gongola State|Gongola]]
|colspan=2|[[Adamawa State|Adamawa]]
|-
|colspan=2|[[Taraba State|Taraba]]
|}