The postal code for Lagos, Nigeria is either 1000001 or 101001. 1000001 is the postal code for the Lagos mainland while 101001 is the postal code for Lagos Island.
Nigerian postal codes contain six digits. The first digit of the postal code represents one of the nine regions of the country. Combining the first digit with the second and third digit represents each district in the country. Some of the other postal codes in Nigeria include 320001 for Yobe, 7000001 for Kano and 930001 for Plateau. For all these regions, a postal code ending with 0001 represents the main postal office in the region.