The study investigated Evaluation of Organizational Climates in Public Secondary Schools in Kano State, Nigeria. The study has six objectives among which are examine the prevailing open, controlled, familiar, paternal, autonomous and closed organizational climate in public Secondary Schools in Kano state. Research questions and hypotheses as well as review of related literature were in line with raised objectives. Survey research method was adapted and the population of the study consisted of 9779 teachers, 846 principals and 111 Ministry of Education officials of the Kano state. Hence, cluster sampling technique was used to derive the sample of the study from the three Educational Zones. The total number of sampled respondents was 366 teachers, 85 principals and 81 Ministry of Education officials. The data for the study was collected through the use of self constructed questionnaire; the validity of the instrument was determined through vetting of the content by expert in educational administration and English language. The reliability coefficient was obtained at 0.77. The data collected were presented by the use of frequency and percentages. The formulated hypotheses of the research were tested using statistical tool of Analysis of Variance (ANOVA) and analyzed the data at 0.05 significant level. The findings of the study revealed that There were practices of autocratic leadership style by the school administrators; due to poor open organization climate in public secondary schools in Kano state. There was poor cordial school community relation due to improper controlled organizational climate in public secondary schools in Kano state. There was effective use of decision making process by the principals to improve familiar organizational climate in public secondary schools in Kano state. In view of the findings and conclusions, it was recommended that the school principals should democratize their leadership style in public secondary schools in Kano State. The school administrators also should enhance cordial school community relation prevailing controlled organizational climate in public secondary schools in Kano state. The principals develop the habit of fair and justice in association with their teachers and students in secondary schools in Kano state. The study further recommended that there should be effective use of decision making process by the principals to improve familiar organizational climate in public secondary schools in Kano state etc