A baby boomer is a person who was born during the demographic Post-World War II baby boom between the years 1946 and 1964, according to the U.S. Census Bureau. The term "baby boomer" is sometimes used in a cultural context. Therefore, it is impossible to achieve broad consensus of a precise definition, even within a given territory. Different groups, organizations, individuals, and scholars may have widely varying opinions on what constitutes a baby boomer, both technically and culturally. Ascribing universal attributes to a broad generation is difficult, and some observers believe that it is inherently impossible. Nonetheless, many people have attempted to determine the broad cultural similarities and historical impact of the generation, and thus the term has gained widespread popular usage.

Baby boomers are associated with a rejection or redefinition of traditional values; however, many commentators have disputed the extent of that rejection, noting the widespread continuity of values with older and younger generations. In Europe and North America boomers are widely associated with privilege, as many grew up in a time of widespread government subsidies in post-war housing and education, and increasing affluence. As a group, they were the wealthiest, most active, and most physically fit generation to that time, and amongst the first to grow up genuinely expecting the world to improve with time. They were also the generation that received peak levels of income, therefore they could reap the benefits of abundant levels of food, apparel, retirement programs, and sometimes even "midlife crisis" products.