White House staff is nearly evenly split among gender lines: 53 percent of the 359 regular employees are men, and 47 percent are women, CNN reported.
CNN found that the divide was due to fewer women in higher paying positions; only six of the 22 highest paid White House employees were women.
Female White House staffers are paid 20 per cent less than their male colleagues, CNN has revealed.
The average salary for male workers was around $104,000, according to the White House's annual report to Congress, whereas for women it was $83,000.
When calculating the averages, Roll Call omitted the three employees who are taking no salary, including the president's daughter, her husband Jared Kushner, and a former Baltimore real estate developer. Press Secretary Sean Spicer, White House Counsel Donald McGahn and chief strategist Stephen Bannon are among the men in that list.
The White House did not respond to a request for comment on the pay differences between male and female employees.
Several of the president's closest aides are choosing not to take a salary. The top salary for permanent employees at the White House is 179,700 dollars.
In 2014, the Washington Post reported that then-President Barack Obama hadn't yet succeeded in closing the gender wage gap in his White House, albeit a much smaller gap than Trump's.
Ivanka told CEOs who attended a summit at the White House in April, that encouraging young women to pursue jobs in professions including science, technology and engineering would help reduce the pay gap.