The purpose of this quantitative correlational study was to investigate the possible correlation of depression, anxiety, stress, and ageism among Baby Boomers in the United States. It was not known if and to what extent a relationship existed between depression, anxiety, stress, and ageism among Baby Boomers in the United States who were born between 1946 and 1964. Beck's Theory of Depression and Folkman and Lazarus's Theory of Stress and Coping served as the theoretical basis and framework for this study's three research questions. Variables of depression, anxiety, and stress were measured on the Depression Anxiety Stress Scale (DASS-21), and the Ageism Survey measured the variable of ageism. Convenience sampling was used to collect data from the target population of Baby Boomers across the United States. The final sample contained 146 participants. Findings indicated that as ageism increased, there was a corresponding increase in depression among Baby Boomers and moderate positive relationship among Baby Boomers relating to ageism, r (144) = 0.34, p < 0.001. As anxiety increased, a corresponding increase in ageism was indicated and a moderate positive relationship among Baby Boomers relating to ageism, r (144) = 0.44, p < 0.001. A moderate positive relationship was indicated among Baby Boomers regarding a corresponding increase in stress as ageism increased, r (144) = 0.41, p < 001. Findings may be used to develop educational programs that focus on the diversity of multigenerational relationships and positive ageism in modern society. Educating counselors, medical professionals, and medical students on ageism and aging could promote improved communication and understanding among generations as the aging population continues to increase. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]