A household includes all of the people who occupy a housing unit. People not living in households are classified as living in group quarters. A housing unit is a house, an apartment, a mobile home, a group of rooms, or a single room occupied (or, if vacant, intended for occupancy) as separate living quarters. Separate living quarters are those in which the occupants live separately from any other people in the building and that have direct access from the outside of the building or through a common hall. The occupants may be a single family, one person living alone, two or more families living together, or any other group of related or unrelated people who share living quarters.

Since the 2010 US Census data, American Community Survey figures showed:

  • Total households in Westchester County fell from 347,232 in 2010 to an estimated 345,885 as per the 2013-2017 ACS, a decrease of 0.4%.  The average household size rose from 2.65 in 2010 to the current estimate of 2.74, an increase of 3.4%.
  • Married couple families in Westchester County increased from the 2010 US Census from 177,077 to 180,366, an increase of 1.8%.
  • Total child population in Westchester County dropped from 228,000 to 199,970, a 12.3% decrease as compared with the 2010 US Census.
 Total Households, Family and Family Status 
 Children Under 18 by Family Status
 Household Size
 Median Household Income and Range