Ruling on marrying
    a woman who has no religion
Question

                Is it permissible for a Muslim man to marry
      a woman who professes no faith or "deen" at all -- an "agnostic"?
Praise be to Allah.This is not permitted at all, because Allaah says
    (interpretation of the meaning): “… they are not lawful (wives) for the
    disbelievers nor are the disbelievers lawful (husbands) for them…”
    [al-Mumtahinah 60:10]. An exception is made in the case of chaste women of the People
    of the Book (Jews and Christians), because Allaah says (interpretation of the meaning): “(Lawful
    to you in marriage) are … and chaste women from those who were given the Scripture
    (Jews and Christians) before your time…” [al-Maa’idah 5:5]. And Allaah
    knows best.