The National Population and Family Planning Agency (BKKBN) targets a continued increase in family planning (FP) coverage, particularly for IUD and implant users. This is expected to contribute to more manageable population growth (Central Statistics Agency, 2021). The BKKBN also launched a postpartum family planning program. Implementing postpartum family planning is crucial, given the uncertainty surrounding the return of fertility after childbirth. One of the advantages of postplacental IUDs is their lower risk of infection, ranging from 0.1% to 1.11%, and fewer cases of bleeding compared to bleeding with IUDs inserted during menstruation. The purpose of this study was to determine the factors influencing maternal interest in choosing postplacental IUD contraception in the third trimester of pregnancy. The population in this study was all third-trimester pregnant women in the Kusuma Bangsa Community Health Center working area, with a total sampling of 63 pregnant women. Data analysis used univariate and bivariate analysis with the chi-square test. Factors influencing maternal interest in choosing a post-placental IUD in this study were employment (0.033), knowledge (0.027), husband's support (0.035), and midwife support (0.044). Based on these results, it is hoped that health workers can support and encourage the public, especially pregnant women in their third trimester, to use post-placental IUDs.