This report summarizes results obtained from a major, nationwide survey of the feed manufacturing industry for 1984:3 The number of U.S. feed mills had declined from about 7,920 at the beginning of the 1970's to 6,720 in 1984. Formula feed production totaled 110 million tons, up from 105 million in 1975, and continued to center in the Corn Belt, Southern Plains, Lake States, Pacific, and Northern Plains. Primary feed production has been trending upward, reaching 87 percent of the total feed tonnage. Despite the importance of complete feed, the use of all supplements and premixes increased in 1984. Primary feed production was classified by type of livestock feed: poultry feed 35 percent, dairy feed 22 percent, beef and sheep feed 21 percent, hog feed 15 percent, and other feeds 7 percent.