Roch Marc Christian Kabore has gone past being a presidential aspirant to being the President elect of Burkina Faso.
Mr Roch Marc, a former prime minister, had 53.5% of the vote on Sunday after months of political unrest.
It was the first election since last year's popular uprising which toppled longstanding President Blaise Compaore.
The vote was due to have been held last month but was delayed by a failed coup in September led by members of the elite presidential guard.
The Independent National Electoral Commission says Mr Kabore, 58, won the elections outright, and there is no need to hold a second round.
It says his main rival, former Economy and Finance Minister Zephirin Diabre, gained 21.6% of the vote.
Mr Diabre has already congratulated Mr Kabore, according to the AFP news agency.
Mr Kabore served as chairman of the ruling Congress for Democracy and Progress party (CDP) before leaving it in 2014, after opposing plans to extend Mr Compaore's rule.