Nearly 21 million Californians have registered to vote in the November election.
The data is from early July, meaning it is likely that the true figure is even higher.
Because of the ongoing coronavirus pandemic, the state is automatically sending a mail-in ballot to every voter who is actively registered, in order to reduce exposure at polling places and make it more convenient for people to vote. The majority of Californians regularly vote by mail.
The deadline to register to vote in California is October 19 and registrations can be submitted by mail or online.