California's 12th congressional district is a congressional district in northern California. Lateefah Simon, a Democrat, has represented the district since January 2025. The district was represented previously by longtime congresswoman Barbara Lee, former Speaker of the House of Representatives Nancy Pelosi (who has since been redistricted to the 11th district), and former president of the United States Richard Nixon.
Currently, the 12th district is located in Alameda County and encompasses the cities of Oakland, Berkeley, Emeryville, Alameda, Albany, Piedmont, and most of San Leandro. With a Cook Partisan Voter Index rating of D+39, the 12th district is the most Democratic district in California, giving nearly 85% of its vote to Kamala Harris in the 2024 presidential election.