Johnson Arthur Sakaja CBS (born 2 February 1985) is a Kenyan politician serving as the governor of Nairobi City County since 25 August 2022.

Sakaja co-authored a book in collaboration with the Kenyan Section of the International Commission of Jurists on Representation and Fiscal Decentralization.

[6] He served as the Chairperson of the Committee of Labour and Social Welfare, a standing Committee which deals with matters pertaining manpower and human resource planning, gender, cultural and social welfare, national heritage, betting, lotteries, sports, public entertainment, public amenities and recreation.

Sakaja is also the Chairman of Kenya Young Parliamentary Association[8] which is a caucus made up of MPs who are below 35 years of age.

[13] Sakaja is deputized by James Njoroge Muchiri who had been serving as Absa Bank Kenya Ltd Chief Operating Officer.

[18] Later in the year, he also won the Jacob Well Award (Men Impacting Differently)[19] Sakaja's political career has included several controversies and allegations of corruption.

[21][22][23] In July 2022, the High Court dismissed a petition challenging the validity of Sakaja's academic qualifications due to lack of evidence.