We explore racial differences in multigenerational living arrangements in 1910, focusing on
trigenerational kin structures. Coresidence across generations represents a public function of
the family, and we observe this across different ages or life-course stages through which
adults came to be at risk for providing simultaneous household support for multiple generations
of kin dependents. Using data from the 1.4 percent 1910 Integrated Public Use Microdata Sample,
our comparisons adjust for marital turnover, including widow(er)hood/divorce and remarriage, as
rates are known to be historically higher among African Americans in this period. Across
subgroups defined by age and sex, we find that African Americans are virtually always as likely
as or more likely than European Americans (of both native and foreign parentage) to live as
grandparents in trigenerational households. Widow(er)hood/divorce generally increased the
likelihood of trigenerational coresidence, while remarriage sometimes increased, sometimes
decreased, and sometimes had no association with this living arrangement. Also, we find that
the life-course staging of household kin support in 1910 differed across race/generation partly
due to different economic and demographic circumstances, suggesting more complexity in kin
support than previously considered. We discuss these findings in relation to the histories of
African American and European American families as well as their implications for future
research.