Purpose: The vaccination level of rotavirus vaccine not supported by the government is not known. As vaccines not included in the national immunization schedule are not registered in the computerized national immunization registry system, their vaccination rate cannot be calculated according to the same method used in government-supported vaccines. Therefore, this study aimed to measure the status of the vaccination rate of rotavirus not included in the national immunization schedule. Methods: The target population is the 0-year-old cohort. The survey population was composed of registered children born in 2017 enrolled in the Immunization Registry Information System. The survey was conducted through a computerized telephone survey method. The survey variables were as follows: vaccination order and date, provider, and data source. Factors related to complete vaccination were the child’s sex, residence, birth order, and parents’ age, educational level, and job status. Results: Children’s vaccination rates for the rotavirus vaccine by 2017 were 88.0%, 86.9%, and 96.6% for the first, second, and third doses, respectively. The rate of complete vaccination was 85.6%. The factors related to rotavirus complete vaccination were the child’s sex and birth order, area of residence, parents’ age and job status, and father’s education level. Conclusion: In the future, it is necessary to conduct regular investigations on the rate of rotavirus vaccination as a tool for the development of the rotavirus infectious diseases control policy or as an evaluation tool for vaccine programs.