BackgroundThe COVID-19 pandemic has posed significant challenges to nations worldwide, affecting various sectors of society. Women’s HIV harm reduction centers, which provide critical services, have also been affected by these difficulties. This study aimed to examine the challenges of the COVID-19 pandemic on the services offered by women’s HIV harm reduction centers from the perspective of clients.MethodsA convergent mixed-method design was utilized to gain in-depth insights into the challenges of COVID-19 on the services provided by women’s HIV harm reduction centers, counseling centers, and night shelters that cater to women at risk, such as drug users, sex workers, and the homeless population, in three provinces (Tehran, Khuzestan, and Kermanshah) in Iran. The study was conducted from January to May 2023. The quantitative aspect of the study employed a cross-sectional method with a sample size of 430 individuals. A researcher-developed questionnaire was used to assess a range of services. The qualitative part of the study involved traditional content analysis and included 32 individual interviews. The integration of qualitative and quantitative results was performed during the interpretation phase to provide a comprehensive understanding of the challenges of COVID-19 on women’s HIV harm reduction centers.ResultsIn the quantitative phase, the mean age of women was 39.0 ± 10.2 years. 165 women reported a history of COVID-19, which accounts for 38.4% of the total. More than half of them (n = 102, 61.8%) recovering at home. The majority of women (n = 365, 84.9%) mentioned receiving the COVID-19 vaccine. COVID-19 diagnostic tests were conducted for 74.2% (n = 319) of women. Women expressed higher satisfaction with the services (HIV prevention services, and accommodation services) before the COVID-19 pandemic compared to the satisfaction during the pandemic. The qualitative analysis identified emerging challenges related to the COVID-19 pandemic in two categories: personal challenges and mismanagement of services, comprising nineteen subcategories.ConclusionThe findings of this study highlight the adverse impact of the COVID-19 pandemic on the services provided by women’s HIV harm reduction centers, in contrast to the pre-pandemic period. To mitigate these negative effects, it is crucial to implement preventive measures and practical solutions. This may involve addressing the personal and management challenges of the centers.