The extended family is making something of a comeback, thanks to delayed marriage, immigration and recession-induced job losses and foreclosures that have forced people to double-up under one roof, an analysis of Census Bureau figures has found.

“The Waltons are back,” said Paul Taylor, executive vice president of the Pew Research Center, which conducted the analysis.

Multigenerational families, which accounted for 25 percent of the population in 1940 but only 12 percent by 1980, inched up to 16 percent in 2008, according to the analysis.

The analysis also found that the proportion of people 65 and older who live alone, which had been rising steeply for nearly a century — from 6 percent in 1900 to 29 percent in 1990 — declined slightly, to 27 percent.