Negative views of aging and older adults are pervasive in contemporary society. This age bias becomes ingrained early in life and can have large implications for the health and well-being of older adults. The overall amount-and influence-of age bias also differs across contexts. In the current study, we examined regional variation in implicit age bias across the United States, linking regional variation in implicit age bias to regional outcomes in health among adults ages 65 and over. We also demonstrate an association between state-level implicit age bias and the psychological process of age-group dissociation, such that older adults living in particularly ageist states tended to dissociate more from their chronological age. We examined these associations using a large sample of over 800,000 Project Implicit participants from 50 U.S. states (and the District of Columbia). 1.1 | Stigma surrounding aging and old age Early in life, we are exposed to an array of messages about what it means to be "old". Representations in media, advertising, entertainment, and art reflect and reinforce cultural notions about the value of maintaining a youthful appearance (Richards, Warren, & Gott, 2012), with the implication that old age is something we should try to avoid or conceal (Smirnova, 2012). There are also commonly held ideas about older adults as a social group and different intellectual traditions have generated models and taxonomies for how attitudes toward older adults are conceptualized. For example, in the stereotype-content model, older adults are generally considered to have relatively low social status and are consistently stereotyped as being interpersonally warm but also incompetent (Cuddy, Norton,