How to obtain Iranian citizenship
According to the principle 976 of iran civil law the following persons are considered to be Iranian
۱)all persons residing in iran except those whose foreign nationality is established: the foreign nationality of such persons is considered to be established if their documents of nationality have not been objected to by the Iranian government.
۲)Those born in iran or out side whose fathers are Iranian.
۳)Those born in Iran of unknown parents.
۴)Persons born in iran of foreign parents, one of whom was also born in iran.
۵)Persons born in iran of a father of foreign nationality who have resided at least one more year in iran immediately after reaching the full age of 18, in other cases their naturalization as Iranian subjects will be subject to the stipulation for Iranian for Iranian naturalization laid down by the law.
۶)Every woman of foreign nationality who marries an Iranian husband.
۷)Children born of foreign diplomatic and consular representative are not affected by items 4 and 5 this article.
Furthermore
Those who reach the full age of 18 under some circumstances would be able to request and obtain Iranian citizenship.