The main purpose of this study was assessment of insecurity in secondary schools in Kaduna State. A population of 8,975 was used comparison of 169 principals, 338 vice principals, 5,070 teachers and 3,380 students. Purposive sampling method in line with research advisor (2006) was used to determine the sample side for the study, where we have the sample of 7 principals, 14 vice principals, 206 teachers and 138 students, making a total sample of 365 was used for this study. A self-design questionnaire entitled “Assessment of Insecurity Questionnaire” (AIQ) was used to assess the Prevalence and Causes of Insecurity. Two research questions were used and analyzed using frequency counts and percentages to fine out the Prevalence, and Causes of insecurity. The major finding of the study revealed the prevalence of insecurity as arm robbery, stealing, trespassing, Rap, sexual harassment, abduction and kidnapping, bombing and school shooting, cultism and fire outbreak, and the Causes of insecurity in secondary schools as unemployment, inflation, porous border, tribalism, government failure, religion extremist among orders. which affects the learning of students in schools. In conclusion, lack of adequate security personnel and nonchalant attitude of school administrators on security issues affecting the academic activities. It was recommended among others that Government should provide security materials/facilities in the schools to ease security problems. The researcher suggested that similar aspects of this research should be extended to other states and Nigeria