Over 5 million persons aged 60 and older are food insecure in the United States. Research on food insecurity among seniors, however, has been sparse. In response, the U.S. Department of Agriculture, Food and Nutrition Service (USDA, FNS) funded a series of studies in this research area. In this introduction, we describe trends and consequences of food insecurity among seniors followed by an overview of the nine funded projects. These papers constitute a second round of papers funded by USDA in this research area –the first round was published in volume 44, issue 2 of this journal.