Johnson Arthur Sakaja (born 2 February 1985) is a Kenyan politician serving as the governor of Nairobi City County since 25 August 2022 elected on a United Democratic Alliance ticket. Previously, he served as the Senator of Nairobi from 2017 to 2022, and as a nominated Member of the National Assembly from 2013 to 2017. He was nominated to Parliament by The National Alliance (TNA) party which was part of the ruling Jubilee Coalition (now Jubilee Party). He was the National Chairman of The National Alliance (TNA) until 9 September 2016 when the party merged with 12 others to form the Jubilee Party.

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