The results from the election commission showed Maliki's State of Law alliance garnered 92 out of 328 parliamentary seats, with the incumbent himself winning more than 721,000 personal votes.
Both were by far the highest such figures from the April 30 election.
But he still fell short of a majority, meaning he will have to win the support of rivals from across the communal spectrum, some of whom have sharply criticised Maliki and refused to countenance his bid for a third term in office.
Maliki's main rivals all finished with between 19 and 29 seats overall, according to an AFP tally of election commission results.
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Iraq's political parties have for weeks been meeting and manoeuvring as they seek to build post-election alliances, but the formation of a new government is still expected to take several months.
As in previous elections, the main blocs are expected to agree on an encompassing package that ensures the prime minister, president and parliament speaker are all selected together.
Maliki's critics accuse him of consolidating power, particularly within the security forces, and blame him for a year-long deterioration in security, rampant corruption and what they say an insufficient improvement in basic services.
The election and its aftermath came amid a surge in violence that has killed more than 3,500 people this year, fuelling fears that Iraq could be slipping back into the all-out conflict that cost tens of thousands of lives in 2006 and 2007.