The government executed the men after an appeals court and the presidency approved the verdict, said Busho Ibrahim, undersecretary of the Justice Ministry.
"They included terrorists and other criminals convicted of abduction and murder as well as assassination plots in several provinces," he said.
Elsewhere in the Iraqi capital, gunmen in military uniforms robbed government accountants as they left a bank with bags of cash. It was the second major robbery in Baghdad in eight days.
Assailants in four vehicles drove up to the Zuwiyah Bank in the Karradah neighborhood and fired automatic weapons in the air, then handcuffed guards and robbed accountants of 1 billion Iraqi dinars, about $709,000, police said.
On Dec. 11, gunmen in Iraqi Army uniforms stole $1 million from a bank truck.
Iraq has seen many other spectacular bank robberies in recent years. Shortly before the United States began bombing Baghdad in 2003, roughly $900 million in US currency was taken from the central bank -- a sum that amounted to about a quarter of Iraq's hard currency reserves.
Some news reports said Saddam Hussein ordered the money taken and sent his son Qusai to grab the cash in the middle of the night. The take was so large it reportedly had to be hauled away in three tractor-trailers.
Hours after the accountants were robbed yesterday, guards at another downtown bank fired on a funeral procession, wounding a mourner. Police said the guards thought that the coffin was fake, and that criminals were masquerading as mourners as part of an elaborate robbery attempt. Police intervened and found the mourners to be genuine.
Also yesterday, the US military announced the death of a Marine in the insurgent stronghold of Anbar Province, bringing to 61 the number of American military personnel killed in December. Some 2,950 US troops have been killed since the US-led 2003 invasion of Iraq.