This study aimed at identifying the role of ICT (information and communication technology) in school administration and the extent of its application by secondary school principals in administration. To guide this study, two research questions were answered and two null hypotheses were tested. The design of the study was a descriptive survey design. The population comprised all the 30 schools in the south eastern states, comprising Abia, Anambra, Ebonvi, Enugu, and Imo states with ICT and Internet facilities. There was no sampling since all the 30 principals from the five states were used for the study. A 26-item questionnaire was constructed and used for data collection. Means and "t"-test statistic were used for data analysis. The findings showed among others that the use of ICT in school administration is a necessity and worthwhile venture especially in this era of globalization, but the extent of their application in secondary schools is very slow as school administrators are incompetent in handling ICT facilities for effective administration of schools. (Contains 4 tables.)