Population Index is the primary reference tool to the world's population literature. It presents an annotated bibliography of recently published books, journal articles, working papers, and other materials on population topics.
The Population Reference Bureau informs people around the world about population, health, and the environment, and empowers them to use that information to advance the well-being of current and future generations.
The U.S. Census Bureau conducts demographic, economic, and geographic studies of other countries and strengthens statistical development around the world through technical assistance, training, and software products.
Formerly known as Zero Population Growth (ZPG) this organization aims to influence public policies, attitudes and behaviors to reduce population growth. Online publications and fact sheets provide information for activists and educators.