Kaliforniaan 12. kongressialue on kongressialue Kalifornian osavaltiossa.
Tietenkin monimutkaisempi versio lauseesta on "California's 12th congressional district is a congressional district in the U.S. state of California that is located within the city of San Francisco". "California's 12th congressional district is a congressional district in the U.S. state of California that is located within the city of San Francisco".