The year 1947 in California involved the following events.
Incumbents Governor: Earl Warren (R) Lieutenant Governor: Frederick F. Houser (R) (until January 6) Goodwin J. Knight (R) (starting January 7) Chief Justice: Phil S. Gibson Senate president pro tempore: Charles W. Lyon (R) Speaker of the Assembly: Sam L. Collins (R)
Crime January 15: Elizabeth Short, later known as the Black Dahlia, is found murdered in Los Angeles. The case remains unsolved.
Events October 14: The Los Angeles County Air Pollution Control District is created by the Los Angeles County Board of Supervisors. It becomes the first air pollution control program in the United States. Chuck Yeager becomes the first confirmed person to break the sound barrier at an altitude of 42,000 ft (12,800 m) over the Rogers Dry Lake of the Mojave Desert. October 20: The televised Hollywood Ten hearings begin before the House Un-American Activities Committee (HUAC) in Washington, D.C., having a chilling effect on the film industry in California. After the hearings, the Hollywood blacklist emerged. Coverage of social issues by Hollywood studios precipitously declined from 28% in 1947 to 18% in 1949, to 9% by 1954.
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