Our understanding of contemporary stepfamily life requires incorporating em
erging trends in cohabitation and nonresident stepparenting into our 'tradi
tional' definition of a stepparent (married adult with resident stepchildre
n). Using the National Survey of Families and Households, I provide a demog
raphic profile of stepparents that includes cohabiting and nonresident step
parents. Adopting this revised view of stepparenthood alters our knowledge
of both the prevalence and composition of stepparent families. The 'traditi
onal' definition of a stepparent is shown to describe less than half of all
stepparents today. Results also highlight diversity in stepparents' parent
ing obligations and sociodemographic characteristics. This revised view of
stepparenthood has implications for future research on and policy targeted
at stepfamilies.