This systematic review aimed to investigate the relationship between attentional focus and performance outcomes, to identify statistical trends, and to offer insights into the implications for swimming training and coaching. A systematic search was conducted across multiple databases to identify relevant studies published up to September 2021. Studies that examined the effects of attentional focus on swimming performance were included. A total of 10 studies met the inclusion criteria and were included in the systematic review. The findings reveal a consistent trend, indicating that attentional focus significantly influences skilled performance in swimming. Studies demonstrated a significant improvement in performance outcomes when attentional focus was directed to relevant cues or specific technical aspects. These statistical trends provide strong evidence for the influence of attentional focus on swimming performance. The findings suggest that directing attention to relevant external cues and specific technical aspects can enhance performance outcomes.