This study was conducted to assess the extent of the effect of family planning services delivery on unmet needs in married women aged 15-49 years in Indonesia. Unmet need is a phenomenon in the area of population that requires serious and immediate handling because it can hamper the increase in CPR and decrease TFR, population growth rate, MMR, and IMR. The provision of family planning services delivery is important in meeting one's needs for using family planning by selecting the right family planning tool according to their needs, to overcome unmet need. This study is an advanced analysis of the 2017 IDHS by using a cross-sectional study design of married or living women aged 15-49 as many as 35,681 women analyzed using the chi-square test and multiple logistic regression, with unmet need as the dependent variable and KB service delivery as a variable independent, as well as several confounding variables. The results showed that the provision of family planning services delivery that were less accessible by respondents had a risk of 2.269 to experience unmet needs compared to those accessed (95% CI = 1.948- 2,642). Therefore, it is necessary to increase the provision of family planning services in providing family planning information so that clients can easily access information about family planning, especially for women who work, live in urban areas and have several children, to increase knowledge and awareness to use family planning according to needs.