BackgroundIran is amongst the first three countries in Middle East and North Africa (MENA) region where two-thirds of region’s new HIV infections are reported. HIV testing at the population level is key to interrupting the HIV transmission chain. The current study aimed to evaluate the history of HIV rapid diagnostic testing (HIV-RDT) and its correlates in northeast Iran.MethodsIn this cross-sectional study, de-identified records of HIV-RDTs were extracted by the census method from the electronic health information system of 122 testing facilities between 2017 and 2021. Descriptive, bivariate, and multiple logistic regression analyses were performed to identify the factors associated with HIV-RDT uptake and risks and drivers of HIV-RDT positivity, separately among men and women.ResultsConducting 66,548 HIV-RDTs among clients with a mean age of 30.31 years, 63% female, 75.2% married, and 78.5% with high school education or below, yielded 312 (0.47%) positive results. Test uptake was comparatively low among men and the unmarried sub-population. Prenatal care and high-risk heterosexual intercourse were the most frequent reasons for taking HIV-RDT among women and men, respectively (76% and 61.2%). High-risk heterosexual contact, tattooing, mother-to-child transmission (MTCT), having a partner at risk of HIV infection, and injecting drugs were test seekers’ most reported transmission routes. One-third of the newly-infected female clients were identified through prenatal testing. Multivariate analysis revealed older age at the time of testing (Adjusted Odd Ratio (AOR) = 1.03), divorce (AOR = 2.10), widowhood (AOR = 4.33), education level of secondary school (AOR = 4.67), and unemployment (AOR = 3.20) as significant demographic predictors of positive HIV-RDT (P-value < 0.05). However, clients’ nationality, testing history, duration of HIV exposure, and reported reasons for taking HIV-RDT were not associated with the test result (P-value > 0.05).ConclusionInnovative strategies are required to scale up test uptake and positive yields among the key population in the region. The current evidence strongly suggests implementing gender-targeted strategies, according to the differences in demographic and behavioral risk between men and women.