The aging of the population does not just involve individuals aging; it involves the growth of and changes in aging families as well. While the structural composition of an older adult' s biological family is relatively simple to identify, knowing who is actually included in a "family" is more of a challenge. Present-day family constellations are more diverse than in the past, requiring an expanded definition of family beyond the nuclear form and beyond traditional criteria involving coresidence and blood ties or legal marriage. Families are also more complex, characterized by both linear and generational relationships, and influenced by the intersections of age, gender, race, class, sexual orientation, and cultural diversity. Bedford and Blieszner (1997) put forth an inclusive definition of family as "a set of relationships determined by biology, adoption, marriage, and in some societies, social designation" (p. 526). As this definition suggests, late-life families comprise an active and ever-changing network of relationships assembled from everyday practices and experiences.The intent of this chapter is to provide an overview of late-late families within the context of couple and family psychology. We begin with the latest demographic data on older adults in the United States and a description of their varied family structures. While these demographic characteristics and family forms are often mirrored or emergent across the globe, inclusion of international research about late-life families is beyond the scope of this chapter in most instances (for a discussion of aging families in a global context see, for example, Lowenstein, 2003, and Keating & de Jong Gierveld, 2015). Next, we examine older adults' relationships with their spouse or partner, adult children, grandchildren, siblings, extended kin, fictive kin, and chosen kin, highlighting contemporary issues that challenge these relationships in late life, including divorce and remarriage, filial norms and expectations, and chronic illness and caregiving. We conclude the chapter with recommendations for theoretical and methodological frameworks needed to guide the study of late-life families and priority areas for future research.
CHANGING DEMOGRAPHICS AND FAMILY STRUCTURESWith the aging of the baby boomer generation, persons aged 65 and older are expected to increase from 46.2 million (i.e., 14.5% of the population) in 2014 to 82.3 million (i.e., 21.7% of the population) by 2040 (Administration on Aging, 2016). Moreover, members of the older population are also aging. Persons 85 years of age and older represent the fastest-growing segment of the older adult population. The number of persons aged 85 and older is projected to grow from 6.2 million in 2014 to 14.6 million in 2040 (Administration on Aging, 2016). The population of adults aged 65 and over comprises 25.9 million women and 20.4 million