This publication, the third in a series of annual updates concerning young children and their families living in poverty in the United States, incorporates new statistical information from the 1992 March Supplement to the Census Bureau's Current Population Survey. The data provide an estimate of family poverty status for 1991 as measured by the federal poverty line, which is adjusted for annual cost-of-living increases and scaled to family size, but is not adjusted for location. In 1991, the poverty line was $10,860 for a family of 3, and $13,924 for a family of 4. The update also reports that the 1990-91 recession had a significant impact on children under age 6 years in America, with the number of poor children in this age group rising from 5.3 million to 5.6 million. Other data reveal that minority children are more likely to be poor than white children, children under the age of 6 years are more likely to be poor than any other age group, poverty-prone children are more likely to be in single parent families, and the poverty rates for children under age 6 years are highest in urban areas. A special section of the report discusses the effects of the 1990-91 recession. Eight tables and seven figures are included. An attachment summarizes data provided in the document. (GLR)