Background. Globally, depression affects an estimated 10 % to 20% of women during pregnancy. There is limited evidence on antenatal depression in Northeast Ethiopia. This study aimed to assess prevalence of antenatal depression and associated factors among Dubti Hospital Antenatal care attendants. Methods. Institution based cross-sectional study was conducted among 363 Antenatal care attendants at Dubti Hospital from March 07 to May 07, 2016. Beck’s Depression Inventory tool was used to collect data. Data were entered into Epi-Data 3.1 and analyzed using SPSS 20. Bivariable and multivariable logistic regression analyses were fitted. Variables having value < 0.05 were considered as statistically significant. Results. A total of 357 pregnant women were interviewed. The prevalence of antenatal depression was 17.9% [95% CI (14.0, 22.0%). Pregnancy planning [AOR: 0.04; 95% CI (0.014, 0.114), social support [AOR: 0.21; 95% CI (0.07, 0.66), and marital conflict [AOR: 6.45; 95% CI (2.1, 17.9)] were significantly associated with antenatal depression. Conclusions. Nearly one in five pregnant women had depression. Marital conflict, pregnancy planning, and social support were significant predictors of antenatal depression. Dubti Hospital should strengthen its effort on prevention of unplanned pregnancy. Healthcare workers in antenatal care unit have to deal with marital conflict and social support as part of their routine investigation to avoid complications through early detection of antenatal depression.