An analysis by the Institute for Women’s Policy Research (IWPR) reveals that about 433,500 private sector employees in San Diego lack even a single earned sick day. Access to earned sick leave promotes healthy work environments by reducing the spread of illness, , increasing productivity, and supporting work and family balance. This briefing paper presents estimates of lack of earned sick leave in San Diego by sex, race and ethnicity, industry, and occupation through analysis of government data sources, including the 2011–2012 National Health Interview Survey (NHIS) and the 2009–2011 American Community Survey (ACS).