<p>Polycyclic aromatic hydrocarbons (PAHs) are widespread environmental pollutants with high persistence and significant toxic effects on ecosystems and human health. Despite numerous regional studies, a comprehensive understanding of their global distribution across major environmental compartments—soil, water, air, and sediment—is still lacking. This systematic review and meta-analysis address this gap by synthesizing worldwide data to reveal spatial patterns and identify regions with higher contamination levels. Comprehensive searches of PubMed, Scopus, Web of Science, and grey literature identified 15,084 records, of which 79 studies met the inclusion criteria. Random-effects meta-analysis was conducted to estimate pooled PAH concentrations across environmental media and evaluate heterogeneity, sensitivity, and publication bias. The results revealed marked regional disparities, with the highest levels generally reported in Nigeria, Iran, China, and Egypt. Water and soil were the most frequently investigated media (28.7% each), followed by air (23.4%) and sediment (19.1%). Indoor air (2369.24 ng/m³) and soil (590.0 µg/kg) exhibited the highest pooled concentrations, while water and sediment showed moderate levels; all media demonstrated substantial heterogeneity (I² &gt; 86%). These findings emphasize that indoor environments and industrially impacted soils are key areas for monitoring and risk management. They also point to the need for standardized analytical protocols and coordinated international efforts to reduce PAH contamination, particularly in regions with limited regulatory oversight.</p>