In 2013, the percentage of California public school students at a healthy weight or underweight was about 53% for 5th graders, 56% for 7th graders, and 59% for 9th graders, similar to the previous year. Figures vary widely at the local level. For example, among counties, the percentage of 7th graders at or below a healthy weight ranged from 41% to 78% in 2013. Statewide, a higher percentage of girls are at or below a healthy weight than boys in grades 5, 7, and 9. Among racial/ethnic groups in California, Native Hawaiian/Pacific Islander, Latino, American Indian/Alaska Native, and African American/Black students have the lowest percentages at or below a healthy weight, whereas Asian American, white, multiracial, and Filipino students have the highest.
Based on a separate analysis of 2005-2010 data by UCLA and the Center for Public Health Advocacy, the percentage of California 5th, 7th, and 9th graders who were overweight or obese (according to the CDC's definition) held steady from 2005 to 2010, hovering around 38%. These data, too, varied widely by county (25% to 47% in 2010) and by city (11% to 53%, among cities with available data). At the state level, the percentage of 5th graders who were overweight/obese consistently was higher than the percentages for 7th and 9th graders. - Kidsdata.org