In this study, we tested the associations among attachment ratings and health behaviors by relationship status. For individuals in relationships, attachment security was associated positively with health promotion and quality sleep and negatively with risk behaviors; fearfulness was associated positively with risk behaviors. With the exception of sleep behaviors, associations with security and fearfulness were reversed for single participants. Associations between dismissingness and quality of sleep support the proposal that individuals who deny or dismiss their attachment needs may experience physical symptoms of distress that affect their health. Future work exploring the benefits of security when coping with illness or lifestyle change is discussed.