Over recent years, there has been an explosion in the collection of state and local level child and youth indicator data by federal statistical agencies and in the dissemination of those data through agency Web sites. This paper reviews these resources and provides information needed to access the data. Data sources are presented in five topical areas: economics and demographics (e.g., decennial Census and Census 2000 Supplementary Survey); health (vital statistics, disease surveillance systems, and health surveys); education (e.g., Common Core of Data and Schools and Staffing Survey); crime and juvenile justice (e.g., Easy Access System and Census of Juveniles in Residential Placement Databook); and child welfare (National Child Abuse and Neglect Data System and Adoption and Foster Care Analysis and Reporting System). Each section begins with an overview of what is available, including descriptions of data portholes that agencies have developed to facilitate access to data, and descriptions of individual data resources, including surveys, administrative data sets, and publications available on agency Web sites. Internet addresses to those resources are provided. Selected nonfederal sources are also briefly covered. An appendix presents a summary listing of federal Web sites containing indicator data on children and youth. (SM)