The 20th century has brought many demographic changes to the United States. This booklet briefly relates some of those changes and provides many charts and graphs to illustrate the changes graphically. The century has been one of population growth, but the rate of growth has slowed since the 1950s. The population is mobile, with more than two out…

Williamsburg County, South Carolina, is an almost entirely rural area near the coast. Although nearly 50% of the population is under 21, there has been a sharp decline in population since its high in 1950. The outmigration, prounounced for black youth, is caused by a lack of industrial opportunities, although there is slow, steady industrial…