en other Orginal research <strong><em>Background:</em></strong> Social well-being is one of the main health dimensions that needs to be assessed.<br> <strong><em>Objectives: </em></strong>As there are few studies on the social well-being dimensions, the current study aimed to determine the social well-being of women of reproductive age and the related factors in Zanjan, Iran.<br> <strong><em>Methods:</em></strong> This cross-sectional study was conducted on 382 women of reproductive age (10-49 years), referred to the Health Centers of Zanjan, Iran. Samples were selected using the stratified cluster sampling method, according to the socioeconomic status. Data were collected, using the Keyes social well-being questionnaire as a tool with good validity and reliability. Data were analyzed through SPSS software using descriptive and analytical tests (Kruskal-Wallis, Pearson Correlation, and Multiple regressions). The statistical significance level was considered as p<0.05.<br> <strong><em>Result</em>:</strong> In total, 382 women were assessed, and their social well-being total mean score was 64.7&plusmn;6.5. The domains of Social contribution (16.8) and Social integration (10.8) had the highest and the lowest mean score, respectively. Those women and their husbands&rsquo; who had a higher educational level (p<0.001, P=0.03) and were employed (P=0.003, p=0,004) were more likely to have better social well-being. A significant association was found between the social well-being and socio-economic level (P<0.001). No significant association was found among age groups and marital status with social well-being. The educational level and sufficient income were found significant as independent variables associated with social well-being in the multiple linear Regression models.<strong><em>Conclusion:</em></strong> The majority of women had a moderate level of social well-being. When planning for improving social well-being, education and income should be considered. Further research to improve the dimensions of social well-being in women in reproductive age is recommended. social well-being, women, reproductive age 9 17 http://nmcjournal.zums.ac.ir/browse.php?a_code=A-10-96-1&slc_lang=en&sid=1 Mahdiye Khodabandelo mahdiyekhodabande@yahoo.com 10031947532846007335 10031947532846007335 No Social Determinants of Health Research Center, Zanjan University of Medical Sciences, Zanjan, Iran Masoumeh Namadian m.namadian@zums.ac.ir 10031947532846007336 10031947532846007336 Yes Social Determinants of Health Research Center, Zanjan University of Medical Sciences, Zanjan, Iran