Kiristanci ya kawo Iraki a cikin 40's AD / CE ta Thomas Manzo, Thaddaeus na Edessa da almajiransa Aggagi da Mari. Thomas da Thaddeus sun kasance daga cikin Manzanni goma sha biyu. 'Yan tsirarun Chaldean na Iraki suna wakiltar kusan 3% na yawan jama'a (a baya CIA Factbook), galibi suna zaune a Arewacin Iraki, suna mai da hankali a cikin Ninewa da Dahuk governorates. Babu ƙididdigar hukuma, kuma ƙididdigar sun bambanta sosai. A 1950 Kiristoci na iya ƙidaya 10<unk>12% na yawan jama'a miliyan 5.0. Sun kasance 8% ko 1.4 a cikin yawan jama'a miliyan 16.3 a 1987 da miliyan 1.5 a 2003 na miliyan 26. Hijira ta yi yawa tun daga shekarun 1970s. Tun daga yakin Iraki na 2003, an sake tura Kiristocin Iraqi zuwa Siriya amma ba a san lambobin ba. Babu adadi mai yawa na Krista a cikin ƙididdigar jama'a a Iraki tun 2003 Tambaya: 1.2 Million?
Shekaru na 1970