The NLM Dataset Catalog allows users to search, discover, and retrieve biomedical datasets across several different repositories. The site is still in beta phase, but it has over 70,000 curated datasets and continues to grow.
The Center for Clinical Observational Investigations (CCOI) has a curated list of national and international datasets. The Dataset Profiles have key information demographics, diseases, and other characteristics important to research.
The All of Us Datasets: The All of Us Research Program, led by the National Institutes of Health, is building one of the largest biomedical data resources of its kind with health data from a diverse group of participants across the United States, with an emphasis on reaching historically underrepresented populations in biomedical research.
The National Neighborhood Data Archive (NaNDA) is a publicly available data archive containing measures of the physical, economic, demographic, and social environment at multiple levels of spatial scale (eg, census tract, ZIP code tabulation area, county). Each NaNDA dataset covers all or most of the entire nation (including both rural and urban areas) and represents a set of measures on a single topic of interest, including socioeconomic disadvantage, healthcare, housing, partisanship, and public transit, with temporal coverage dating back to 2000.
ScHARe (Science Collaborative for Health Disparities and Artificial intelligence bias REduction) is a cloud-based research collaboration platform developed by the National Institute on Minority Health and Health Disparities (NIMHD) and the National Institute of Nursing Research (NINR).
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Not sure where to start? Explore MedlinePlus Health Topics. Each topic has a section on Statistics and Research. Find organizations that collect data about your topic of interest.