The study was carried out to establish the impact of information and communication technology (ICT) on tertiary institutions administration in Nasarawa State, Nigeria. A descriptive research design was adopted in conducting this research. Four research questions and hypotheses were used to guide the study to a coherent conclusion. A structured questionnaire titled: ICT and administration of tertiary institutions assessments questionnaire (IATIAQ) was used to elicit information from the respondents. The study population comprised all staff of public tertiary institutions in Nasarawa state. Stratified random sampling method was used to select 127 staff and 6 tertiary institutions used in the study The data generated was evaluated using Pearson correlation co-efficient (r) and t-test statistical tools. The findings revealed that ICT has a significant impact on school records management, student's academic performance, teacher's job performance and instructional supervision which are amongst the key components and essential parameters of measuring the achievement of tertiary institutions in Nasarawa state. The study therefore recommends provision of adequate funds, manpower and ICT facilities to schools, regular monitoring and evaluation of school activities and routine training and retraining of staff on ICT appreciation and application in Nasarawa state.