The median age at first marriage increased to 28.2 for men and 26.1 for women in 2010, an increase from 26.8 and 25.1 in 2000, according to the U.S. Census Bureau. This increase is a continuation of a long-term trend that has been noted since the mid-1950s. In addition, the overall percentage of adults who were married declined to 54.1 percent in 2010 from 57.3 percent in 2000.
According to America's Families and Living Arrangements: 2010, the average household size declined to 2.59 in 2010, from 2.62 people in 2000. This is partly because of the increase in one-person households, which rose from 25 percent in 2000 to 27 percent in 2010, more than double the percentage in 1960 (13 percent).