This document provides an overview of secondary data and packaged information. It defines secondary data as information collected by someone other than the researcher for a purpose other than the current research project. The document discusses internal and external secondary data sources and how to evaluate secondary data. It also defines packaged information as prepackaged data or research services and discusses the advantages and disadvantages of syndicated data and packaged services. Specific secondary data sources like the U.S. Census and American Community Survey are explained. Marketing applications of secondary data and packaged information are also covered.