Facebook Inc. Chief Executive Mark Zuckerberg on Wednesday told lawmakers that his own personal data was included in that of 87 million or so Facebook users that was improperly shared with political consultancy Cambridge Analytica.

But he pushed back on Congress members' suggestions that users do not have enough control of their data on Facebook in the wake of the privacy scandal at the world's largest social media network.

"Every time that someone chooses to share something on Facebook ... there is a control. Right there. Not buried in the settings somewhere but right there," the 33-year-old internet magnate told the U.S. House of Representatives Energy and Commerce Committee.