The study examined the relationship between participation in decision-making and teachers job performance in secondary schools in Ekiti State, Nigeria. Descriptive survey research design was adopted in the study. The population of the study comprised all 7,177 teachers and 202 principals in all the 202 public secondary schools in the sixteen local government areas in Ekiti State. The sample for this study was 384 respondents comprising 24 principals and 360 teachers drawn from 24 public secondary schools in Ekiti State. Multi-stage procedure which involved simple random was used to select sample for the study. Two instruments tagged “Participation in Decision-Making Questionnaire” (PDMQ) and “Teachers Job Performance Questionnaire” (TJPQ) were used to collect data. The instruments were validated and found reliable with reliability coefficients of 0.86 and 0.82 respectively. Descriptive statistics of frequency counts, percentages and mean were used to answer the research questions and Pearson Product Moment Correlation was used to test the hypotheses at 0.05 level of significance. The study revealed that participation in decision-making was significantly related to teachers’ job performance. Based on the findings of the study, it was recommended that Secondary school principal should ensure active participation of teachers at all decision-making levels to the extent that is possible and plausible in order to boost their morale, enhance sense of belong and increase job performance. Keywords: Decision-making, Teachers participation, Teachers job performance,