What is the percentage of American families with 20 children?

The Census Bureau does not issue statistics that break down families by number of children above three children, or alternately, above a household size of seven family members. As of 2013, families with seven or more family members constituted 1.7 percent of family households in the United States.

As of 2013, the Census Bureau statistics indicate that 1,358,000 out of 80,902,000 American family households consist of at least seven family members. Households with seven or more family members may include grandparents or other members who are not children. As of 2010, families households with three or more children comprised 7,122,000 of 78,833,000 total family households, or 9 percent.