Census of Agriculture -
National Agricultural Statistics Service. Covers most recent 5-year censuses: 2002, 1997, and 1992. Data searchable by state, county, zip code, or U.S. as a whole.
FAOSTAT - Food and Agriculture Organization
of the United Nations. Contains over three million time-series records
covering international statistics in agriculture and related areas.
NASS Hogs and Pigs - National Agricultural Statistics Service, USDA. Access to the quarterly Hogs and Pigs reports and other reports from the 1960s to present.
National Agricultural Statistics Service - United States Department of Agriculture. U.S. agricultural information, reports, historic data, charts, maps, and statistics by state
U.S. Hogs and Pigs
Charts - National Agricultural Statistics Service, USDA. Detailed color charts illustrate various data trends for U.S. swine.