Tied to 1970 benchmark figures developed to reflect the 1970 relationship between regional farm population estimates obtained from the Census of Population and the Current Population Survey, this 1975 report on farm population estimates is derived from a probability area sample of the 48 conterminous States, consisting of approximately 17,000 area segments providing information on about 25,000 farm households. Presented via narrative and tabular data, this report includes: U.S. farm population by regions and divisions, April 1975 and 1970; U.S. farm population and components of farm population change by regions and divisions, April 1974-75; annual averages of components of farm population change and rate of net migration for the U.S. by regions and divisions, April 1970-75; net outmigration from the farm population, 1920-75; and farm population and migration, 1920-75. Among the more pertinent data presented are: the number of persons living on U.S. farms averaged 8,864,000 in the 12-month period; the 1975 farm population was 850,000 or 8.7% less than in 1970; for the 1970-75 period, the average net loss to the farm population via migration or reclassification of residence was about 200,000 or 2.1% annually; both the number of net outmovers and the rate of outmovement for 1970-75 were substantially less than in other recent periods; while the South continued to have a heavy loss of farm population, the West was estimated to have increased by 5%. (JC)