Pay gaps of up to 37% have been discovered between white workers and those from a black, Asian or minority ethnic background (BAME) in Greater London Authority organisations.
London Mayor Sadiq Khan said he planned to tackle the “injustice” of pay inequality as he published the data.
The information shows ethnic pay gaps of almost 10% in Transport for London, 16% in the Metropolitan Police, 30% in the London Legacy Development Corporation and 37% in the Old Oak and Park Royal Development Corporation.
The reason for the gap was given as an under-representation of BAME employees in senior jobs.
Sadiq Khan said: “London is renowned throughout the world as a progressive and diverse city and that’s why it is important for me to publish City Hall’s first ever ethnicity pay audit.
“I am deeply troubled that members of the black, Asian and minority ethnic community who work at these organisations earn on average less than their white counterparts, and I am determined to confront this inequality.
“This sort of injustice takes many years to develop and it becomes deeply entrenched. My administration is finally beginning the process of turning this around.
“I’m urging all London’s public bodies and businesses to join me in doing what they can to right this injustice and calling on the Government to consider if it is appropriate to legislate to make ethnicity pay audits a legal requirement, as is the case for gender pay reporting.”