Flag of Nigeria
| Use | National flag | 
|---|---|
| Proportion | 1:2 | 
| Adopted | 1 October 1960 | 
| Design | A vertical bicolour triband of green, white and green. | 
| Designed by | Michael Taiwo Akinkunmi | 
| Use | State flag | 
| Proportion | 1:2 | 
| Design | A vertical bicolour triband of a green, white and green; charged with the coat of arms in the centre. | 
| Use | Civil ensign | 
| Proportion | 1:2 | 
| Design | A red field with the national flag, in the canton | 
| Use | State ensign | 
| Proportion | 1:2 | 
| Design | A blue field with the national flag, in the canton | 
| Use | Naval ensign | 
| Proportion | 1:2 | 
| Design | A white field with the national flag in the canton, with the Naval seal in the fly. | 
| Use | Air force ensign | 
| Proportion | 1:2 | 
| Design | A sky-blue field with the national flag in the canton, with the air force roundel in the fly. | 
The flag of Nigeria was designed by Michael Taiwo Akinkunmi and was officially adopted to represent Nigeria at midnight on 1 October 1960, the day the country gained independence. The flag was chosen as part of a nationwide open contest held by the government, with Akinkunmi's design being selected as the winner of a field of over three thousand entries. The flag is a vertical bicolour green-white-green design, with green representing agriculture and white representing peace and unity.
The flag was raised for the first time in a ceremony by Lieutenant David Ejoor of the Army Guard.