An immediate postpartum period is a good opportunity to utilize immediate postpartum long-acting reversible contraceptives for women whom they want to delay pregnancy. Long-acting reversible contraceptive methods like intrauterine device, Jaddel and implants can improve maternal and newborn health by preventing unintended pregnancy. Despite on their advantage, evidence on its utilization and associated factors is limited in our study area.Ethiopia. This study assessed the utilization of immediate postpartum long acting reversible contraceptives and its associated factors among mothers who delivered in selected public hospitals of Addis Ababa, Ethiopia, 2022. An institutional-based cross-sectional study design was conducted among 420 study participants to assess the immediate postpartum long-acting reversible contraceptive utilization and its associated factors from August 30- September 25, 2022. Systematic sampling technique was used to select study participants. Data was entered into epi-data version 4.6 and analysis was performed by using SPSS version 25. Descriptive statistics and logistic regression were used. All statistical tests were significant at P-value < 0.05. A total of 417 postpartum women were participated in the study making a response rate of 99.3%. Of the total study participants, 30.7% [95% CI (26.1, 35.3)] utilized immediate postpartum family planning. Women at the age of 25-34 years (AOR = 3.228[95% CI: 1.140-9.136]), had discussion with their partners about family planning (AOR = 1.891[95% CI: 1.003, 3.565]), received counseling about immediate post-partum long acting reversible contraceptive (AOR = 3.146 [95% CI: 1.489, 6.647]), had positive attitude towards immediate post postpartum long acting reversible contraceptive (AOR = 3 [95% CI: 1.770-5.648]) were associated with utilization of immediate post-partum long acting reversible contraceptive. Almost one in three women delivering in health facilities of Addis Ababa Ethiopia started using immediate post-partum long acting reversible contraceptives. Discussion about contraception with partners, getting counseling about family planning on antenatal care, attitude toward contraception and the age of women were all factors that could increase IPPLARC uptake. Healthcare providers clarify any rumors about contraceptives to assure a positive and supportive attitude to increase its uptake.