True. The typical family structure in the US is a nuclear family, consisting of two married parents (a mother and a father) and their children. However, different family structures are becoming more common, such as single parent families, families who live with their extended family (such as grandparents, aunts or uncles, etc.), homosexual couples and their children, and families with parents who have divorced and remarried (making these families stepfamilies, because they have a stepfather or stepmother). The nuclear family structure is in decline:
The percentage of married-couple households with children under 18 has declined to 23.5% of all households in 2000 from 25.6% in 1990, and from 45% in 1960. However, 64 percent of children still reside in a two-parent, household as of 2012.
Source: Boundless. “Family Structures.” Boundless Sociology. Boundless, 20 Jan. 2016. Retrieved 07 Feb. 2016
However, as you can see in the quote above, the majority of kids still live in a family with two parents.