A survey of more than 1,100 Iraqis and 71 percent of those polled want the US forces in Iraq to leave within a year.
The poll was conducted by the Program on International Policy Attitudes (PIPA) at the University of Maryland for WorldPublicOpinion.org
Of that group, 37 percent want a US withdrawal within the next six months, according to the poll.
Responses varied by community: 57 percent of Sunnis wanted a US withdrawal in six months, an option supported by just 11 percent of Kurds and 36 percent of Shiites.
Support for attacks on US troops has also increased considerably: 61 percent approve of the attacks, up from 47 percent in January, according to the poll.
And a whopping 78 percent thought that the US presence in Iraq is provoking more conflict than it is preventing. Only the Kurds, 56 percent, believe that US troops are a stabilizing force.
The poll was carried out between September 1-4 among 1,150 Iraqis with a plus-or-minus three point margin of error.
US War cost
A new report to the US Congress estimates the total cost of military operations in Iraq and Afghanistan could reach $US549 billion ($A731.46 billion) this year.
That figure also includes enhanced security at military bases since the September 11, 2001, terrorist attacks.
The projection was made by the nonpartisan Congressional Research Service is based on an update in July from the White House Office of Management and Budget.
It estimated that the war costs will total $US110 billion ($A146.56 billion) for the fiscal year 2007, which begins on Sunday.
In fiscal year 2005, the Pentagon spent an average of $US6.4 billion ($A8.53 billion) a month in Iraq and $US1.3 billion ($A1.73 billion) a month in Afghanistan.
During fiscal year 2006, it's projected that those costs will have increased to about $US8 billion ($A10.66 billion) a month in Iraq and $US1.5 billion ($A2.0 billion) a month in Afghanistan.
But the true figure may prove to be higher, if current trends hold. The Pentagon had hoped to reduce its troop presence in Iraq to fewer than 100,000 by the end of this year.
But military commanders are planning to keep at least 140,000 troops there through the spring because of the high level of violence.