This document provides an overview of data sources and research strategies for conducting a community health needs assessment. It discusses using reliable and available data ideally from sources like the US Census Bureau and federal health agencies. However, it notes there may be information gaps or constraints requiring context. The document describes American Community Survey data collection periods and sample sizes and when 1-year, 3-year, and 5-year estimates are best used. It also lists some potential health-related federal agencies, departments, and databases as well as visual tools and other sources that could provide additional useful data.