"This is the second wave of expulsions, and two or three more will follow," said Nureddin Qablan, deputy head of the Nineveh provincial council.
Iraq's second city, Mosul was recaptured in July after being taken in a lightning summer 2014 offensive by the Islamic State group.
"A total of more than 1,200 members of jihadists' families will be transferred" from Tel Keif detention centre north of Mosul to a similar facility in the capital, Qablan said.
An Iraqi government source has told AFP that about 300 of the women were Turkish.
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According to the Norwegian Refugee Council NGO, which is seeking access to the detainees for humanitarian purposes, they are mainly from Turkey, Azerbaijan, Russia and Tajikistan.
What to do with captured jihadists and their families has been an issue of great concern in their home states.
For example, French jihadist prisoners will be tried in Iraq, French Foreign Minister Jean-Yves Le Drian has said, adding that children would be treated "on a case by case basis".