SparkNotes
Spark Notes: Social Trends of the 1950s
Spark Notes gives a brief overview of the 1950s from consumerism and conformity to poverty to youthful rebellion. A good review of this important decade in American history.
US Census Bureau
U.s. Census Bureau: Population and Household Economics
U.S. Census Bureau statistics involving 40+ subdivisions of the U.S. population and statistics involving these demographics.