This study ascertained principals' application of communication skills as a correlates of teachers' job performance in secondary schools in Anambra State. Three research questions guided the study and three hypotheses were tested at 0.05 level of significance. Correlation survey research design was adopted for the study. The population of the study comprised 6,396 secondary school teachers in Anambra State. Multi-stage sampling technique was used to sample 665 teachers for the study. The researchers-developed two sets of questionnaire titled "Principals' Communication Skills Questionnaire (PCSQ)" and "Teachers' Job Performance Questionnaire (TJPQ)" were used for data collection. The instruments were validated by three experts comprising two lecturers from the Department of Educational Management and Policy, and the other a specialist in Measurement and Evaluation all from the Faculty of Education, Nnamdi Azikiwe University, Awka. The reliability of the instruments were ascertained using Cronbach alpha and it yielded reliability co-efficient of 0.81, 0.78 and 0.76 for the three parts of PCSQ and 0.77 for TJPQ. The researchers together with five research assistants collected data for the study. A 98% return rate was recorded. Data analysis was done using Pearson's Product Moment Correlation Coefficient to answer the research questions and t-test to test the hypotheses. The findings of the study revealed among others that there is a moderate relationship between principals' application of verbal skill and teachers' job performance in secondary schools in Anambra State. It was also found out that there is significant relationship between principals' application of feedback skill and teachers' job performance in secondary schools in Anambra State. Based on the findings, it was recommended among others that Ministry of Education should sponsor principals to workshops, seminars and conferences to enable them up-date their knowledge and communication skills in order to create conducive school environment that would enhance teachers' job performance.