en Geriatric Medicine Geriatric Medicine Original Research Original Research <strong>Background: </strong>Successful aging is a prominent and worldwide theme in gerontology. However, until recently, only few studies were conducted about successful aging in Iran. This study examined whether a healthy lifestyle could predict successful aging among older Iranians.<br> &nbsp;&nbsp; <strong>Methods: </strong>This cross sectional and descriptive study included 975 older Iranians who were selected through a multistage cluster-quota method from the health centers of Shiraz, Iran. A 5-part questionnaire, including demographic characteristics, the Seniors&rsquo; Healthy Lifestyle, Barthel Index, the Diner Life Satisfaction and Quality of Life, was used to collect the data. A logistic regression analysis was used in data analysis; data were analyzed using SPSS 21; and significance level was set at &alpha; = 0.05.<br> &nbsp;&nbsp; <strong>Results:</strong> The prevalence of successful aging among older Iranians was calculated at 24.0%. Results of multiple logistic regression analysis revealed that age (95% CI = 1.129- 1.702 and OR = 1.352), gender (95% CI = 0.412-0.764 and OR = 0.687), education level (95% CI = 1.443 &ndash; 1.699 and OR = 1.454), job (95% CI = 1.063-1.413 and OR = 1.185), monthly income (95% CI = 1.355-4.055 and OR = 2.272), insurance (95% CI = 0.344-0.842 and OR = 0.540), source of income (95% CI = 1.014-1.298 and OR = 1.145), and healthy lifestyle (95% CI = 0.772 - 0.858 and OR = 0.814) were predictors for successful aging.<br> &nbsp;&nbsp; <strong>Conclusion: </strong>Findings indicated that successful agers were mostly younger men, with higher education level and monthly income, who had insurance and a job and a healthy lifestyle. Thus, to age successfully, one must maintain and improve healthy lifestyle to prolong one&rsquo;s health.<br> &nbsp; Healthy lifestyle, Prevalence, Successful aging 958 964 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-4688-1&slc_lang=en&sid=1 Mohsen Shafiee ikfyums@yahoo.com 200319475328460064470 200319475328460064470 No Department of Nursing Geriatric, Nursing and Midwifery School, Shiraz University of Medical Sciences, Shiraz, & Department of nursing, Abadan University of Medical Sciences, Abadan, Iran Maryam Hazrati hazratim@sums.ac.ir 200319475328460064471 200319475328460064471 Yes Community Based Psychiatric Care Research Center, Shiraz University of Medical Sciences, Shiraz, & Deputy Ministry of Nursing Affaires, Ministry of Health and Medical Education, Tehran, Iran Seyedeh Ameneh Motalebi ammotalebi@yahoo.com 200319475328460064472 200319475328460064472 No Social Determinants of Health Research Center, Research Institute for Prevention of Noncommunicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran Sakineh Gholamzade sakinghsir@yahoo.com 200319475328460064473 200319475328460064473 No Community Based Psychiatric Care Research Center, Shiraz University of Medical Sciences, Shiraz, Iran Haleh Ghaem ghaemh@sums.ac.ir 200319475328460064474 200319475328460064474 No Department of Epidemiology School of Health, Shiraz University of Medical Sciences. Shiraz, Iran Asmidawati Ashari asmidawati@upm.edu.my 200319475328460064475 200319475328460064475 No 7. Department of Human Development and Family Studies, Faculty of Human Ecology, Universiti Putra Malaysia, Serdang, Selangor