BackgroundThe World Health Organisation recommends that all mothers seek postnatal care (PNC) within the first two months after childbirth. This study examined PNC utilisation for babies within the first two months after childbirth.MethodsWe used data from the most recent Demographic and Health Surveys (DHS) (2018–2020) of eleven countries in SSA. Descriptive and a multivariate analysis were carried out, and presented in adjusted odds ratios. The explanatory variables included: age, place of residence, level of formal education, wealth quintile, antenatal care visits, marital status, frequency of watching TV, listening to radio and reading newspaper, getting permission to go medical help for self, getting money needed for treatment, and distance to facility.ResultsPNC utilisation was 37.5% and 33% in urban and rural residences, respectively. Higher level of education (Urban: AOR = 1.39, CI = 1.25, 1.56; Rural: AOR = 1.31, CI = 1.10, 1.58), 4 or more ANC visits (Urban: AOR = 1.32, CI = 1.23, 1.40; Rural: AOR = 1.49, CI = 1.43, 1.56 0.86), requiring permission to go to the health facility (Urban: AOR = 0.67, CI = 0.61, 0.74; Rural: AOR = 0.86, CI = 0.81, 0.91), listening to the radio at least once a week (Urban: AOR = 1.32, CI = 1.23, 1.41; Rural: AOR = 0.86, CI = 0.77, 0.95), and watching television at least once a week (Urban: AOR = 1.11, CI = 1.03, 1.21; Rural: AOR = 1.15, CI = 1.07, 1.24) were significantly associated with PNC service utilisation in both rural and urban areas. However, belonging to a richer wealth status (AOR = 1.11, CI = 1.02, 1.20) and having a problem with distance (AOR = 1.13, CI = 1.07, 1.18) were significant in only rural areas, while having a problem with money for treatment was significant only in urban areas (AOR = 1.15, CI = 1.08, 1.23).ConclusionIn this study, we conclude that the PNC service utilisation within the first 2 months after delivery was low across rural and urban residences. There is, therefore, a need for SSA countries to develop population tailored interventions such as advocacy and health education targeted at women with no formal education in both rural and urban areas. Our study also suggests that SSA countries must intensify radio programs and advertisements on the health benefits of PNC to improve maternal and child health.Supplementary InformationThe online version contains supplementary material available at 10.1186/s12884-023-05758-4.