...I was able to locate this website and corresponding information:
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The Christian minorities in Iraq today are among the oldest in Christendom. They make up about 6% of the population numbering fewer than one million out of a population of 17 million. They consist of two main groups:
1. The Catholics (650,000)
A. Chaldean Rite: more than 600,000 with one patriarch (Babylon in Baghdad); four archdioceses (Kirkuk, Mosul, Basra & Arbil; and five dioceses (Alqosh, Amadijah, Aqra, Sulaimaniya & Zakhu)
B. Syrian Rite: more than 47,000 with two archdioceses (Baghdad and Mosul)
C. Latin (Roman) Rite: more than 4000 with one archdiocese (Baghdad).
D. Armenian Rite: more than 3000 with one archdiocese (Baghdad).
2. The Other Christians (200,000)
A. The Church of the East, formerly Nestorian. More than 150,000.
B. Syrian Orthodox: More than 40,000.
C. Armenians. More than 5000.
The above figures are derived from CHALDEANS PAST AND PRESENT by Fr. Michael Bazzi (1993)
The Chaldean Church in the United States is divided into two dioceses, the Eparchy of St. Thomas the Apostle located in Detroit, MI consisting of 31 states with about 100,000 members in seven parishes and the Eparchy of St. Peter the Apostle located in El Cajon, CA consisting of 19 states with about 35,000 members in seven parishes. The Eparchy in Detroit is headed by Mar Ibrahim Ibrahim and the Eparchy of El Cajon is under Mar Sarhad-Yawsip Jammo.
UPDATE
Since we published this page, Mission "Iraqi Freedom" appears to be emerging as a civil war between the minority, formerly dominant, Sunni Muslims who seek through violence to prevent the inevitable emergence of the majority Shia Muslims to the position of power and control of the state and its oil and gas reserves. As for the Christian minorities in Iraq, their situation as infidels in a Muslim country grows ever more precarious. Christians are publicly harassed; their women are insulted for not dressing as Muslims; their businesses destroyed; and their churches are bombed, with the result that many are fleeing abroad. (see Christian Flight from the Middle East at:
http://www.byzantines.net/byzcathculture/christflight.html) Recently elections were held in Iraq resulting in the unquestionable ascendancy of the Shia to power. Already their clerics have made it clear that they want a new constitution based on the Quran and governed by the sharia (Muslim law code). Accordingly it appears to us highly likely that in the future Iraq will resemble the Islamic Republic of Iran. America's misadventure in Iraq is bearing bitter fruit.
<MORE>
http://www.byzantines.net/epiphany/chaldean.htm<also see link>
http://en.wikipedia.org/wiki/Assyrian_Church_of_the_East