US Census Bureau
United States Census Bureau: Poverty in the Us [Pdf]
The US census report on poverty published in 2001.
C-SPAN
C Span Classroom: Teaching About Poverty
Learning module in which students use current and relevant information to take a close look at poverty in America, past and present, and examine how the government should address it. Comprehensive multi-media learning materials include...
Other
The Feminization of Poverty: Past and Future
Very extensive report on the poverty trends among females in the U.S. and the reasons for these trends. Also contains information on recent and past poverty rates and ratios.