Voting for the Nov. 6 election began Tuesday in Santa Clara County, with early-bird voting open and about 640,000 mail-in ballots sent out to county residents.

The county is offering several physical locations to submit early ballots. In Palo Alto, voters can submit their ballots at the City Clerk's Office at City Hall, 250 Hamilton Ave. or to the outside drop box at Mitchell Park Library, 3700 Middlefield Road. Ballots can be dropped off at any time of the day at Ricnonada Library's outside drop box at 1213 Newell Road, among other 24/7 drop-off locations across the county.

Residents can also send their ballots in the mail with prepaid postage included with each ballot. Ballots submitted by mail must be postmarked on or before Election Day and received by Nov. 9. Physically submitted ballots are due by 8 p.m. on Election Day.

The last day to register to vote in California is Oct. 22. Registration can be completed or verified online at registertovote.ca.gov.

Visit sccvote.org for more information.

Find more coverage on Palo Alto races and measures, including upcoming election events and videos of voter-education events here.