The Odum Institute Data Archive is hosted by the H. W. Odum Institute for Research in Social Science at the University of North Carolina at Chapel Hill. Formally established in 1969, the Odum Archive houses one of the largest catalogs of machine-readable social science data in the United States. This catalog includes the Louis Harris Data Center, the National Network of State Polls, the Carolina Poll, the Southern Focus Poll, and the most complete collection of 1970 United States Census datasets. These and other dataset collections comprise the over 24,000 files that are publicly accessible through the Odum Institute Archive Dataverse. The focus of the Odum Archive is on the long-term preservation, discovery, access and reuse of social science research data and associated materials that provide context for use of the data.