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We systematically review the effectiveness of police presence. In doing so, we investigate concepts of police presence and differences between reported effects. Using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines and protocols, we systematically identify and review eligible studies on police presence. Further, quality assessment and findings synthesis are used to map limitations of current research as well as grounds for future avenues. The systematic search strategies yielded 49 studies focusing on testing the effects of police presence or evaluating its measurement. We find evidence that police presence has mostly crime reduction effects on crimes related to motor theft, property, violence and guns. Police presence also reduces calls for service and improves traffic behaviour. Police presence focused on specific areas, times and types of crime achieves …