The number of households with at least one out-of-work parent soared by a third from 2005 to 2011, according to a new U.S. Census Bureau report on families and living arrangements.

The increase in some states was more dramatic than the national average. California, New Jersey and Connecticut all saw increases of more than 60 percent between 2005 and 2011.

In Hawaii, the number of such homes nearly doubled, rising 95 percent. And in hard-hit Nevada, the number of homes with an unemployed parent rose by 148 percent.

The Census Bureau data confirm the findings of private researchers as well. A March report on the children of the unemployed from the Urban Institute, a policy research organization, found that more than 1 in 6 children had an unemployed or underemployed parent last year, down slightly from a 2010 peak.