After 10 days of counting votes, the country's electoral commission announced that the constitution had been approved by a wide margin nationwide.

On 2 October 2005, the National Assembly weakened the second requirement such that it would only fail to be fulfilled if two-thirds of registered voters—rather than actual voters—in three governorates voted "no."

While the exact ethnic distribution of the Iraqi population by governorate is unknown, because the country had not had an official census for 15 years, governorates that include substantial Sunni populations include Baghdad, Al Anbar, Salah ad Din, Nineveh and Diyala.

On 17 October, however, election officials announced that questions concerning the turnout in some provinces required that the vote be audited, which delayed release of the final figures.

Although Sunni politician Saleh al-Mutlaq has alleged fraud, election monitors from the United Nations said that the vote "went well.