Background: Caregivers' satisfaction is one of the most frequently used outcome measures for quality of care offered by routine immunization (RI) service providers. It has been shown to positively influence compliance of caregivers with subsequent RI visits. This study assessed caregivers' satisfaction with RI services in primary, secondary and tertiary health facilities in Sokoto metropolis, Nigeria Materials and method: A descriptive cross-sectional study was conducted in three health facilities in Sokoto metropolis. A structured questionnaire was used to collect data from 217 caregivers who were selected via multistage sampling technique. Results: Mean age of respondents was 27 years ±5.49 and majority were Hausa-Fulani [183(84.3%)]. Majority of the caregivers in all the three categories of health facilities (HFs) surveyed spent more than 30 minutes to immunize their children (median total clinic wait time = 48 minutes). Caregivers were largely satisfied with most activities of the clinics; overall, 91.7% (n=199) of them were satisfied. Several factors were associated with caregivers' satisfaction; however, the significant predictors were tribe, providing adequate information about vaccine given to the child and availability of vaccines at all times (p<0.05). Conclusion: Up to three-fourth of the caregivers spent more than half an hour to receive RI services however, the overall satisfaction was excellent. The main predictors of caregivers' satisfaction were tribe, provision of information regarding the vaccine and availability of vaccines at all times. There is need for more efforts to be made by heads of the HFs and service providers to reduce waiting time at the RI clinics and also ensure vaccines are available at all times.