This "Policy Research Brief" summarizes publicly-available data sources that provide information about the employment of people with intellectual and developmental disabilities. It provides important information about these data sources, including their purposes, key definitions, and where to access the public data. Using these data sources, a state-by-state comparison of employment outcomes is conducted to provide readers with a picture of the employment landscape for people with intellectual and developmental disabilities. Finally, a discussion about how the data can be used, and the limitations of the data, is provided.