Abstract Introduction The impact of armed conflict and war on mental health is well documented, with limited data on populations living in unrecognized states. In this study, we examined the prevalence and risk factors of symptoms of depression among the Nagorno-Karabakh population during a ceasefire period, prior to a blockade, full-scale military attack, and their forced displacement. Methods A total of 1023 women, aged 18-49 years, from all regions of Nagorno-Karabakh, participated in a population-based household survey in 2022, which included the Center for Epidemiologic Studies-Depression (CES-D) 16-item scale to assess their depression symptoms. Simple and multivariable linear regression analyses explored the socio-demographic factors associated with CES-D score. Results The mean CES-D score was 8.90 (SD = 8.93), and 13.1% of the respondents had a score >18 (presence of depressive symptoms). The adjusted linear regression showed that CES-D score was higher among divorced (2.66, SE = 1.15, p-value=0.021) or widowed (3.09, SE = 1.57, p-value=0.049) vs. married, and among those having war-related deaths in the household in the previous 2 years (8.60, SE = 1.65, p-value<0.001) vs. not having. Conversely, a vocational/university level (-2.33, SE = 0.70, p-value=0.001) or post-graduate education (-3.81, SE = 1.72, p-value=0.027) vs less than secondary/secondary level, and 3-5 members in the household (-2.71, SE = 1.16, p-value=0.020) vs.1-2 members were significantly associated with lower CES-D score. Conclusions Our findings suggest that depression symptoms are highly prevalent among women in conflict-affected areas, with specific socio-demographic factors increasing the risk of depression symptoms. These results highlight the importance of providing mental health support and interventions for women in conflict-affected areas, particularly for those who experienced loss in the family due to war, are divorced or widowed, live in small households, and have lower education. Key messages • Depression symptoms are highly prevalent among women of reproductive age in areas affected by armed conflict and war. • Mental health intervention is recommended for women in conflict-affected areas who experienced loss due to war, are divorced or widowed, live in small households and/or have lower education.