Children under 18 by household type (5-year average) in Washington

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Definitions: The number and percent of children under 18 by household type, for those in family households. This indicator is divided into three household types: married couple family households, single female headed households, and single male headed households.

Data Source: The U.S. Census Bureau's American Fact Finder, 2005-2009, 2006-2010, 2007-2011, 2008-2012, and 2009-2013 American Community Survey (ACS) 5-Year Estimates. Data were retrieved on July 28, 2015 from: (Table B09005).

*Please use these estimates with caution. The total confidence interval (upper bound minus lower bound) of the percent estimate, is 10 percentage points or greater, which indicates that this estimate has a large margin of error. This generally occurs when estimate relies on small number of cases. To obtain total confidence interval values around the estimates for this indicator please contact Washington KIDS COUNT.

S: These data have been suppressed because the percent estimates have a total confidence interval of 10 percentage points or greater and/or the counts are 10 or fewer.

Footnotes: Data last updated in July 2015 by Washington KIDS COUNT. 

The 2009-2013 ACS data release marked the fifth time that 5-year estimates were released for all counties in Washington state. The ACS 2009-2013 data were collected during calendar years 2009, 2010, 2011, 2012, and 2013. 

The 5-year ACS estimates represent the average characteristics over the 5-year period of time, and therefore are less current than 1-year ACS estimates. However, these estimates are more reliable than 1-year and 3-year ACS estimates because they are based on a larger sample size. The 5-year estimates are also available for all geographic areas because of their sample size, whereas the 3-year  estimates are published for populations of 20,000 or greater, and the 1-year estimates are only published for populations of 65,000 or greater. More information about 1-year versus 3-year versus 5-year ACS surveys and estimates are available online at

ACS classifies households by type according to the sex of the householder and the presence of relatives. A householder is the person, or one of the people, in whose name the home is owned, being bought, or rented.