The deadliest single attack was a bomb that exploded on a highway between Baghdad and the northern city of Mosul, killing three police and four detainees who had been captured during a raid.
Six shootings in Mosul itself -- one of the most dangerous parts of the country -- killed seven people, including the brother of a provincial councillor, a health directorate employee and three security forces members.
In north Baghdad, a roadside bomb exploded near bicycle shops in the Sadr City area, killing at least two people and wounding at least seven, while another bombing in the Hurriyah area wounded at least three more people.
Iraq has been hit by a year-long surge in violence, driven by widespread discontent among members of the Sunni Arab minority and the bloody civil war in neighbouring Syria, that security forces have failed to curb.
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All of the city of Fallujah -- just a short drive from Baghdad -- and part of Anbar provincial capital Ramadi, to its west, have been held by anti-government fighters since early January.
More than 610 people have been killed in attacks and clashes since the beginning of the month, and over 1,600 since January 1, according to AFP figures based on security and medical sources.