This report provides an overview of the United Nations Population Fund (UNFPA), its current mission and operations, and recent funding trends. It further discusses the role of the United States in supporting the UNFPA programs, the varying interpretations by several Administrations of legislative authorities pertaining to UNFPA's eligibility for American resources, and congressional debates over how much and under what conditions the United States should voluntarily contribute to UNFPA operations. Finally, it reviews the findings of several private and U.S. government investigations of China's family planning programs and the role UNFPA plays in their implementation.