An analysis by the Institute for Women’s Policy Research (IWPR) finds that approximately 44 percent of workers living in California lack even a single paid sick day. This lack of access is even more pronounced among low-income and part-time workers and shows considerable variability across counties in California. Access to paid sick days promotes safe and healthy work environments by reducing the spread of illness and workplace injuries, reduces health care costs, and supports children and families by helping parents to fulfill their caregiving responsibilities. This briefing paper presents estimates of access to paid sick days in California by sex, race and ethnicity, occupation, part/full-time employment status, personal earnings and county of residence through analysis of government data sources, including the 2010–2012 National Health Interview Survey (NHIS), and the 2012 American Community Survey (ACS).