This study aimed to predict job performance based on decision-making styles and coping styles in primary school teachers in Boukan County. The design of the present study was descriptive-correlation. The statistical population of the study consisted of all primary school teachers in Buchan city in the academic year 1397-98 (840). To determine the sample size, the Morgan table was used and 265 people were selected as the samples who were selected using the available sampling method. Data were collected based on three questionnaires of Patterson (1989), job performance, Scott and Bruce’s general decision-making styles (1995) and coping styles of Roger et al. (1993) with Cronbach's alpha coefficient of 0.89, respectively Descriptive statistics and inferential statistics (Pearson correlation coefficient and multivariate regression analysis) and SPSS software were used for statistical analysis of data. Findings showed that there was a positive and significant relationship between job performance with rational and intuitive decision-making styles, a negative and significant relationship between job performance with avoidant and instantaneous styles, and a relationship between dependent decision-making style and job performance. There was a positive and significant relationship between job performance and rational, emotional, and avoidant coping styles, negative and significant, and no relationship, respectively. The findings also showed that rational, intuitive, avoidant, instantaneous decision-making styles as well as rational and emotional coping styles are able to predict job performance in teachers.