Background. Evidence suggests that equitable provision of contraceptive services can help women achieve their reproductive goals and has significant impact on reducing the rates abortion and unintended pregnancy at large. However, regional disparities continue to persist on top of low family planning prevalence which is a critical public health challenge for fast growing populations like Nigeria. Objectives. The present study aimed to explore the prevalence of (1) nonuse of modern contraceptives, (2) unmet need for contraception, and (3) regional disparities in these two. Methods. The present study used cross-sectional data obtained from the Nigeria Demographic and Health Surveys conducted in 2003, 2008, and 2013. Participants were women of reproductive of age (15-49 years) regardless of marital status. Regional disparities of nonuse of modern contraceptives and unmet need were analysed by descriptive and multivariate regression methods. Results. In the pooled sample of 79,656 participants during 2003, 2008, and 2013, 88.6% reported not using any modern methods, and 13.5% reported having unmet need for contraception. The prevalence rates of nonuse were, respectively, 91.8%, 90.6%, and 88.6% and those of unmet need were 14.2%, 16.6%, and 13.5% in the years 2003, 2008, and 2013. Significant differences were observed in the odds of reporting nonuse and unmet need for contraception across the geopolitical zones. Conclusions. The rates of nonuse of contraception are remarkably high among women in Nigeria with significant disparities across the six geopolitical zones. Efforts should be made to address the regional disparities in order to achieve the goals of universal coverage of family planning services in the country.