This report provides data on the use of mobility devices in the United States by providing a detailed profile of the population using these devices. It covers their demographic characteristics; health and disability status, including diagnoses and impairments, physical functioning, and activities of daily living; and health insurance status. The report also addresses the accessibility of mobility device users' homes and larger environments. Introductory material includes highlights of the report and analysis of data sources and accuracy. The first major section focuses on population estimates and sociodemographic comparisons, including age and gender, race and ethnicity, educational attainment, employment and labor force participation, family income, and location and setting of residence. The following section addresses the health and disability status of mobility device users, including self-reported health status, hospitalization history, perceived disability status, activity limitation, functional limitation, activities of daily living, and instrumental activities of daily living. The third section considers health conditions and impairments associated with use of mobility devices by age group and by leading conditions. The next section considers accessibility features and problems, including those within and around the home, those outside the home, and public transportation. A brief section on health and insurance and a section on conclusions complete the report. Twenty-six tables are included. (DB)