The most recent comprehensive demographic study of the California prison system was completed in 2013. According to this state prison census, there were 134,160 inmates in California correctional facilities that year. Of these, 39,451 prisoners were African American, representing 29.4% of all inmates. A less extensive 2016 survey shows similar numbers, indicating that these figures are more or less stable. 55,421 prisoners were Latino in 2013. This represents 41.3% of California inmates. Latinos are the largest racial group by far in the California prison system. 23% of inmates are white, and 6.3% belong to other racial groups. Numbers relating to the probation and parole systems are less easy to come by, but it is likely that similar percentages exist.
One glaring issue is that African Americans and Latinos are overrepresented in the state's prison system. According to census estimates from 2015, California's total population is 39% Latino and 6.5% African American. This shows that, for African Americans in particular, a disproportionate amount of the population is in the prison system.