Turnout was 74 percent of 6.8 million registered voters.
- The result is likely to trigger criticism from Chakwera, who had warned of alleged attempts to rig the election.
- Opposition parties have complained that numbers on many vote count sheets were altered using correction fluid.
- The European Union observer mission had described the election campaign as "well-managed, inclusive, transparent and competitive".
Malawian President Peter Mutharika has won re-election by a narrow margin, official results showed Monday, holding on to power in a ballot marked by fraud allegations.
The final count of last week's vote was released after a court battle, with opposition leader Lazarus Chakwera obtaining a temporary injunction to bar the release of results over alleged vote-rigging.
38.57 PER CENT
Shortly after the interdict was lifted, the Malawi Electoral Commission said Mutharika, who heads the ruling Democratic Progressive Party (DPP), won 38.57 percent of the vote with Chakwera, of the Malawi Congress Party (MCP), on 35.41 percent.
Less than 159,000 votes separated the two men, it said. Turnout was 74 percent of 6.8 million registered voters.
The result is likely to trigger criticism from Chakwera, who had warned of alleged attempts to rig the election and said his party's own count showed him ahead.
The electoral body had stopped releasing results updates on Friday after receiving 147 complaints from parties that had contested Tuesday's vote.
Chakwera's MCP went to court over what it claimed were irregularities in results from 10 of the country's 28 districts.
Opposition parties have complained that numbers on many vote count sheets were altered using correction fluid.
MCP spokesman Eisenhower Mkaka said on Saturday the party had turned to the courts because of "very glaring irregularities" on results sheets.
Some documents showed "the same handwriting coming from different polling stations which are miles apart," he said, adding there was "a lot of tippexing".
"What we are seeing is a fraudulent election, the result has been tampered with," he claimed.