Paul Chebor, who ran for the Rongai parliamentary seat with the United Democratic Alliance, is now the member of parliament.
Chebor easily defeated incumbent MP Raymond Moi, who was his closest rival, to win the seat.
On the independent party ticket, Kanu, Moi was running.
Chebor won the race with 27,021 votes, far ahead of Moi, who received 14,715 votes.
Luka Kigen, a former local MP, finished third with 593 votes.
After serving the previous two terms in a row, Moi was running for a third term.
Speaking at Nakuru Technical Training College after being named the Rongai MP-elect, Chebor promised to collaborate with his rivals for the benefit of the Rongai community.
He expressed gratitude to the electorate for giving him the position of leadership and promised to uphold tranquility.
On August 9, the local MP elections were called off due to an alleged ballot-paper mix-up.
The voting was moved to Monday, August 29.
Only 50% of the registered voters turned out for the election, marring it with low voter turnout.
84,625 people in Rongai are registered to vote.