ObjectiveMillions of women want to delay or avoid pregnancy, but they are not using contraception, especially in refugee settings. Due to lack of contraception, one fifth of reproductive age group women suffered from unwanted pregnancy and unsafe abortion, which accounted for 78% of maternal mortality in refugee camps. Therefore, the aim of this study was to assess the prevalence of unmet need for modern contraception and its associated factors among reproductive age group women in Eritrean refugee camps, Tigray, Northern Ethiopia, 2016.Results400 women of reproductive age group interviewed. Prevalence of unmet need for modern contraception in this study was found to be 41.8% (95% CI 36.99%, 46.63%).Respondents’ unfavorable attitude towards modern contraceptive methods [AOR = 0.372, 95% CI 0.170, 0.818] and the availability of modern contraceptive methods [AOR = 3.501, 95% CI 1.328, 9.231] were factors significantly associated with unmet need for modern contraception. Respondents’ attitude towards modern contraceptive methods and availability of modern contraceptives were independent predictors of unmet need. Governmental and non-governmental organizations should design programs to create behavioral change in women’s attitude towards contraceptive use and to secure the availability of contraceptive methods in refugee camp settings.