Report Foreword: This chartbook draws together information on major features of population trends in the United States. The charts and maps are intended to illustrate mobility and distribution of people. They do not present a complete picture of current trends. They are not intended to support any special hypotheses regarding the nature or consequences of such trends. Many of the illustrations are new. Some have been published before. Most of them are derived from surveys of the Bureau of the Census. The commentaries and most of the illustrations were prepared by the Population Studies Group of the Economic Development Division, Economic Research Service. We hope that this information will be especially useful to the Subcommittee on Internal Migration of the President's Council for Urban Affairs; to the President's Council for Rural Affairs; to officials of the Department of Agriculture; and to others interested in rural and urban economic development.