Background: In today’s world, feelings of loneliness and declining mental health are among the most significant challenges of old age, which can lead to a reduction in the quality of life among older adults. Therefore, the present study aimed to determine the effectiveness of resilience training on mental health and loneliness in older adults. Method: This quasi-experimental study employed a pretest–post test design with a control group. The statistical population consisted of all older people residing in nursing homes in Tabriz, Iran. One nursing home was randomly selected, and subsequently, 30 people were recruited using convenience sampling and randomly assigned to experimental and control groups. The experimental group received resilience training in seven sessions, while the control group did not receive any intervention during this period. The Goldberg–Hillier General Health Questionnaire and the Russell Loneliness Scale were used as evaluation instruments. Data were analyzed using uni-variate analysis of covariance (ANCOVA) in SPSS version 26. Results: The results showed a statistically significant difference between the two groups in terms of loneliness and mental health (p<.05). The findings demonstrated that resilience training had a significant effect on improving mental health and reducing loneliness in older adults. Conclusion: The findings of this study suggest that resilience training can be utilized as an effective approach to enhance mental health and reduce feelings of loneliness in older adults.
