We'd mentioned before that Seattle has 45% more dogs than children, and another study confirms that Seattle has relatively few children. In fact, of all US cities, Seattle has the second lowest rate of children living in the city limits, behind San Francisco:

Less than 20 percent of all Seattle households included children younger than 18, compared with 34 percent nationally and 33 in Washington state.

While the low rate of children here is striking, it's not especially surprising, considering the high cost of living, especially for home ownership, which prices many families out of the city and into the suburbs. And, with Seattle's city limits being smaller than sprawling cities elsewhere in the country, suburban expansion long ago filled Seattle to its edges, pushing families looking for new developments into suburbs outside of Seattle. Seattle also attracts singles and young married couples like us without children who create demand for small condos and apartments.