Fresh elections must be held within 60 days.
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The court cited irregularities and indicated that a new poll should be organized within 60 days, BBC reports.
The incumbent president, Uhuru Kenyatta was declared the winner of the recently held election.
But the opposition candidate Raila Odinga said that the results were manipulated after claims that the commission's IT system had been hacked.
READ ALSO: Kenya's Election Court Case
Kenya’s President Uhuru Kenyatta was declared the August 8 poll winner with 54.27 percent to 44.74 for challenger Raila Odinga.
Meanwhile, opposition leader Raila Odinga has described the Supreme Court's annulment of last month's presidential election result as a "very historic day for the people of Kenya and by extension the people of the continent of Africa".
Supporters of opposition Raila Odinga are celebrating the annulling of the presidential election result.