This piece provides a backdrop for considering the value to the community from your worksite wellness activities—specifically their contribution to reducing health disparities.  This report to assess disparities across a wide range of diseases, behavioral risk factors, environmental exposures, social determinants, and health-care access provides new data for 19 of the topics published in 2011 and 10 new topics. The purpose of this report is to raise awareness of differences among groups regarding selected health outcomes and health determinants and to prompt actions to reduce disparities. The findings in this supplement can be used by practitioners in public health, academia and clinical medicine; the media; the general public; policymakers; program managers; and researchers to address disparities and help all persons in the United States live longer, healthier, and more productive lives.  Published: 2013