The 1,333 individuals, from 14 countries, surrendered to Kurdish forces at the end of August after an Iraqi offensive drove the extremist group from the northern town of Tal Afar, near Mosul, Iraqi security officials said.
The women and children will not be charged with crimes and will likely be repatriated to their home countries, the source added.
Most of the ISIL family members hail from Central Asia, Russia and Turkey, but the group also includes people from as far away as Japan and South Korea.
Tens of thousands of foreigners traveled to Iraq and Syria to live in the ISIL group's self-styled Islamic caliphate.
The women and children are now living in tents and receiving aid from humanitarian groups. They are among hundreds of thousands of Iraqis displaced by fighting over the past year.
XINHUA/MNA