At the Institute for Family Studies website, Lyman Stone reports:

Nearly 4 in 10 children in America are not residing with their own two, married parents (biological or adoptive). This is according to the recently released 2018 American Community Survey, the largest annual social survey carried out in America. As recently as 1960, less than 2 in 10 children lived apart from two married parents, a reality which was approximately stable as far back as 1850. But while the present situation leaves many children bereft of the care, attention, and material benefits of a married household, it’s actually not as bad as it has been in the past: since 2014, the share of children living with two married parents has risen ever-so-slightly, from 61.8% to 62.3% in 2018, and data from early 2019 in the Current Population Survey suggest that 2019 will show further improvement. The period from 2011 to 2019 is the longest period of stability or improvement in children’s living situations since the 1950s.

He also presents a helpful graph that summarizes the latest findings and places them in their historical context:

Not exactly great news, but a positive development all the same.