This purpose of the study was to investigate the Information and Communication Technology competencies among teachers in public and private senior secondary schools in Port Harcourt Metropolis. The study adopted a descriptive research design survey, The study was guided by four research questions and four hypotheses. The population for the study was 6,117 teachers in both public and private senior secondary schools in Port Harcourt Metropolis. The sample comprised of 697 teachers (332 teachers from public secondary schools and 365 teachers in private senior secondary schools) were drawn using the Taro Yamene’s formula. A self-structured questionnaire was used as the instrument for data collection. The questionnaire was subjected to both face and content validity by two experts in Educational Technology and Statistics. Reliability of the instrument was established using test-retest method in which the result yielded a reliability index of 0.83. Data collected were analyzed using mean and standard deviation, while the hypotheses were tested using z-test statistics at 0.05 level of significance. The finding showed that public senior secondary school teachers’ competency in Word Processing, internet Surfing, computer Interface design and Power Point Presentation were adequate. In addition, it was found that the competency level of private schools was higher than those of the public schools. Based on the results, it was recommended that public senior secondary school teachers should be provided with the opportunity to improve and update their competencies in ICT practices. To achieve this hands-on workshops should be provided for the teachers