Michael A. Loebs, a 39-year-old lecturer in political science at San Francisco State University, is running with no party preference. He is an organizer with the California National Party, which advocates for secession from the U.S. and policies including universal basic income and single-payer health care.

Joel A. Ventresca, 69, of San Francisco, worked for the city and county of San Francisco on the aging and airport commissions. He lost bids for city treasurer in 1997and for mayor in 2019. Ventresca, a Democrat, was on the executive committee of the Services Employees International Union.

For the record: The biography for Joel A. Ventresca was corrected.