BackgroundWith the global increase in the older adults population, understanding factors that impact their quality of life is crucial. The perception of aging and self-efficacy are significant factors affecting older adults health outcomes. This descriptive cross-sectional study investigates the relationship between Aging Perception and self-efficacyamong older adults individuals in Birjand city, a demographic that is rapidly increasing but under-research.MethodsThis cross-sectional study was conducted from September 2022 to September 2023 on 400 older adults individuals in Birjand city. Participants were selected using a random sampling method from four regions, ensuring a representative sample. Data were collected through two main questionnaires: the Shortened Perceived Aging Questionnaire (SPAQ) and the General Self-Efficacy Questionnaire (GSE), both validated for the Persian-speaking population. Statistical analysis was performed using SPSS SOFTWARE. ARMONK, NY: IBM CORP. version 26, employing nonparametric tests due to the non-normal distribution of data.ResultsThe study found a strong positive correlation between Aging Perception and self-efficacy (Spearman’s R = 0.79, p < 0.001), indicating that a more positive perception of aging is associated with higher self-efficacy. The analysis also revealed that men generally reported a more positive perception of aging and higher self-efficacy compared to women. However, underlying diseases and marital status did not significantly affect the Aging Perception or self-efficacy scores.ConclusionsThe findings suggest that enhancing self-efficacy among the older adults could improve their perception of aging, potentially leading to better health outcomes and quality of life. This study underscores the need for targeted interventions that consider cultural and gender-specific factors. Further research using longitudinal designs is recommended to explore the causality between Aging Perception and self-efficacy and to confirm these findings across different regions and cultural backgrounds in Iran.