- In 2008, an estimated 49 million Americans, or 16% of the total U.S. population, lived in a family household that contained at least two adult generations or a grandparent and at least one other generation. In 1980, this figure was just 28 million, or 12% of the population.
- This 33% increase since 1980 in the share of all Americans living in such households represents a sharp trend reversal. From 1940 to 1980, the share of Americans living in such households had declined by more than half (from 25% in 1940 to 12% in 1980).
- The growth since 1980 in these multi-generational households is partly the result of demographic and cultural shifts, including the rising share of immigrants in the population and the rising median age of first marriage of all adults.
- But at a time of high unemployment and rising foreclosures, the number of households in which multiple generations of the same family double up under the same roof has spiked significantly. Our report finds that from 2007 to 2008, the number of Americans living in a multi-generational family household grew by 2.6 million.
- This trend has affected adults of all ages, especially the elderly and the young. For example, about one in five adults ages 25 to 34 now live in a multi-generational household. So do one-in-five adults ages 65 and older.
This report was published by the Pew Research Center on 18 March 2010.