Immunization is the process whereby a person is made immune or resistant to an infectious disease, typically by the administration of the vaccine (WHO 2013). It is a process of inducing or conferring immunity by artificial means. A vaccine is all kinds of immunogenic that are capable of inducing specific protection against communicable disease agents by stimulating the immune system in the body through initiating the immune response, without producing any disease (Dhaar and Robbani, 2006). The main purpose of this research was to find ways of improving immunization utilization in Damaturu. This can be achieved with the following objectives; to determine the level of immunization utilization among children below one year of age in Damaturu, to establish the relationship between institutional factors and immunization utilization in Damaturu, and finally to examine the relationship between socio-demographic and immunization utilization. Cross-sectional descriptive research study was carried out among 272 mothers within the reproductive age in Damaturu using cluster and simple random sampling technique. Data was collected using a structured questionnaire and was analyzed using SPSS to establish the relationship between the dependent and independent variables. The results showed that 77.4% of the respondents were utilizing immunization services. Majority of the respondents were between the ages of 18-34, married and had non-formal education. In correlation analysis using chi-square test; age (p=0.001), educational level (p=0.001), attitude (p=<0.001), income(p=<0.001), occupation(p=<0.001), information(p=0.001), equipment(p=<0.001), building (p=<0.001), time spent(p=<0.001), availability of vaccines(p=<0.001) and adequate staffs (p=<0.001) were found to have significant relationship with utilization of immunization services in this study. The result of this study has clearly indicated that the level of immunization utilization is good in Damaturu. All the socio-demographic in this study were found to be significantly related to utilization of immunization services except religion. There is still a need to sustain and strengthen regular health education and mobilization. There is a need to educate health workers to improve the manners in which they handle their client.