The present study investigated the personality traits, self-efficacy and job performance of police officers. It was hypothesized that there was a significant relationship between personality traits, self-efficacy and job performance of police officers. Another hypothesis was that the personality traits were likely to be the strong predictors of job performance of police officers. The sample size consisted of (N=100) police officers ranking from constables, head constables, Assistant sub-inspectors, sub-inspectors, inspectors and Station House Officers (SHO), selected from various police stations of district Shiekhupura and Lahore. The age of the participants ranged from 18-58 years . All of these participants completed translated versions of Big Five Personality Questionnaire (Oliver, 1999), Generalized Self-Efficacy Scale (Schwarzer & Jerusalem, 1992) and modified Job Performance Appraisal (Schraeder, 2007) in addition to Demographic Information Questionnaires. The data was analized through Statistical Package for Social Sciences (IBM SPSS) version 22.0. Pearson Product Moment correlation was used to investigate relationship among various personality traits, self-efficacy and job performance of police officers. Regression analyses was employed which showed that among all personality traits openness proved to be the strongest predictor of job performance. The findings from the current research study carry strong implications for formulating organizational strategies of police department. The findings can be used to emphatically predict the specific traits holders as being successful police officers.