The study examined the conceptual understanding of ICT Integration in Education among Secondary School Teachers in Mizoram. The research aimed to find out the level of conceptual understanding of secondary school teachers towards ICT integration in their teaching learning and how demographic factors like gender and age influence a teacher’s ability. Data were randomly collected from 550 secondary school teachers (275 male and 275 female) from 11 districts in Mizoram. The Test for Conceptual Understanding (T-ICT) was constructed by the investigator and was used to collect data from secondary school teachers. The result revealed that 52.73% of teachers had an average level of conceptual understanding towards ICT integration in education. While 7.09% teachers had low level of conceptual understanding towards ICT integration in education. The findings revealed no significant difference in the level of conceptual understanding of ICT integration in education among secondary school teachers in Mizoram with respect to their gender and age. The study suggests that systematic training of ICT for both teachers and schools. Administrator should be provided with adequate ICT devices like computers, smart boards, projectors, online teaching platforms, multi-media content, and internet connectivity, uninterrupted electricity to support effective ICT-based teaching to make classroom teaching more effective and to enhance teachers’ higher-order ICT integration competencies.