ABSTRACTObjectives:Optimism and pessimism are distinct constructs that have demonstrated independent relationships with aspects of health and well-being. The purpose of this study was to investigate whether optimism or pessimism is more closely linked with physical and mental health among older adults.Design:Cross-sectional survey.Participants:Community-dwelling older adults (N = 272) ages 59–95 in the southern United States.Measurements:The Life Orientation Test—Revised and the Short Form 8.Results:At the bivariate level, optimism was associated with higher physical health and mental health, while pessimism was associated with lower physical health and mental health. Multiple-regression analyses as well as comparison of correlation coefficients found that pessimism was more closely associated with physical health and mental health than optimism.Conclusions:These results add to the literature suggesting that, in terms of older adults’ health and well-being, avoiding pessimism may be more important than being optimistic.