This workshop will cover the Integrated Public Use Microdata Series (IPUMS) and the North Atlantic Population Project (NAPP) databases. These data projects make up the world’s largest collection of publicly available individual level census data, and the data covers a time period from the 1800s through the present. These data include Decennial Census data from the United States, Canada, Great Britain, Norway and Sweden. We will explain how the datasets were created and integrated, and we will demonstrate how they can be obtained free of charge through the web-based extraction system. We will also give examples of using the data in historical research and answer questions regarding using the data for historical analysis. For more information on the IPUMS and NAPP, go to www.ipums.org.