This report contains 1993 estiiiates of world population by country and region from 1950 to 1990 and projections to 2050 The projections show that world population will expand from 5.3 billion in 1990 to 6.2 billion in the year 2000 and to about 10.7 billion by the year 2050. The aggregate annual population growth rate is expected to decline from nearly 1.8 percent annually in the 1980's to just above 1.6 percent in the 1990's and then to average 1.1 percent between 2000 and 2050. The annual rate of increase for the world is expected to drop to 0.7 percent by 2050. The population data are provided for 222 countries and autonomous geographic units, 14* geographic regions, and the world. The data include population series for each republic of the former countries of Czechoslovakia, Soviet Union, and Yugoslavia. The principal data source is the International Data Base of the Bureau of the Census, U.S. Department of Commerce. In some cases, country data and Economic Research Service estimates were used.