Farmers are only 8 percent of all owners of private U.S. land, but they own 46 percent of it, the largest share of any group. White-collar and blue-collar workers are a majority of owners, at 52 percent, but own only a quarter of the private land. Retired persons (21 percent of all owners) own about 17 percent. Family units own most of the private land; nonfamily units (estates, partnerships, corporations), representing 6 percent of all owners, own 18 percent of the land. Federal, State, and local governments own about 40 percent of the total 2.3 billion acres in the United States.