The policy will begin in the US and expand to other regions over the next few months.
“I know that many of you continue to deal with very challenging circumstances related to the pandemic.”
The announcement comes as regions around the world have seen coronavirus cases surge due to the delta variant.
In California, Google’s home state, some counties have mandated masks again for people gathering indoors.
Facebookalso said on Wednesday that it would require workers on its US campuses be vaccinated.
Netflix will require vaccinations for casts of its US productions,Deadline reported.
Twitter said it’s closing the company’s opened offices inNew York and San Franciscoand pausing future office re-openings.
The company said that the office closures are temporary but they don’t have a new timeline for reopening.
In addition, all Uber employees around the world must now wear masks if they’re in the office.
CNET’s Queenie Wong and Abrar Al-Heeti contributed to this report.