Nigerian nationality law is the law of Nigeria which concerns citizenship and other categories of Nigerian nationality.
. (1) The following are ways to gain citizenship in Nigeria
By birth-namely- (a) Every person born in Nigeria after the date of independence (October 1, 1960), either of whose parents or any of whose grandparents belongs or belonged to a community indigenous to Nigeria;
Provided that a person shall not become a citizen of Nigeria by virtue of this section if neither of his parents nor any of his grandparents was born in Nigeria.
(b) Every person born outside Nigeria either of whose parents is a citizen of Nigeria.
(2) In this section, "the date of independence" means the 1st day of October 1960.
By registration: 26. (1) Subject to the provisions of section 28 of this Constitution, a person to whom the provisions of this section apply may be registered as a citizen of Nigeria, if the President is satisfied that -
(2) The provisions of this section shall apply to-
(a) Any woman who is or has been married to a citizen of Nigeria or every person of full age and capacity born outside Nigeria any of whose grandparents is a citizen of Nigeria.
By naturalization: 27. (1) Subject to the provisions of section 28 of this Constitution, any person who is qualified in accordance with the provisions of this section may apply to the President for the same of a certificate of naturalisation.
(i) Resided in Nigeria for a continuous period of fifteen years; or
(ii) Resided in Nigeria continuously for a period of twelve months, and during the period of twenty years immediately preceding that period of twelve months has resided in Nigeria for periods amounting in the aggregate to not less than fifteen years.
28. (1) Subject to the other provisions of this section, a person shall forfeit forthwith his Nigerian citizenship if, not being a citizen of Nigeria by birth, he acquires or retains the citizenship or nationality of a country, other than Nigeria, of which he is not a citizen by birth.
29. (1) Any citizen of Nigeria of full age who wishes to renounce his Nigerian citizenship shall make a declaration in the prescribed manner for the renunciation.
(2) The President shall cause the declaration made under subsection (1) of this section to be registered and upon such registration, the person who made the declaration shall cease to be a citizen of Nigeria.
(3) The President may withhold the registration of any declaration made under subsection (1) of this section if-
(a) The declaration is made during any war in which Nigeria is physically involved; or
(b) In his opinion, it is otherwise contrary to public policy.