This article, presented at the Research and Measurement of Public Health Core Functions Science Symposium sponsored by the Centers for Disease Control and Prevention (CDC) in June 1994, provides selected data from the 1992-1993 National Profile of Local Health Departments. The National Association of County and City Health Officials (NACCHO), in cooperation with the CDC Public Health Practice Program Office, recently completed the 1992-1993 National Profile of Local Health Departments. This study describes public health at the local level and updates the first Profile study, conducted in 1989. The study population included 2,888 local health departments (LHDs) in the United States. Responses were received from 72% of LHDs. Comparisons are made with the 1990 Profile where available. This article provides a selected overview of the information contained in the 1992-1993 Profile and includes structure of LHDs, top agency executive, staffing, expenditures, and planning. The findings have important ramifications for community health planners and policy makers at all levels. With the ongoing potential for change in the U.S. health care system, reliable data establishing baselines and monitoring trends in public health at the local level are important. The information in this report, and the 1992-1993 National Profile of Local Health Departments, updates and expands the available knowledge of LHD structures and activities.