Campylobacter species are primarily known for causing gastrointestinal infections in humans. Globally, Campylobacter species are increasingly recognised as emerging pollutants in aquatic environments. This chapter reviews the emergence of Campylobacter in aquatic environments, exploring its sources, factors driving its emergence, public health implications, and monitoring and management interventions for preventing its emergence. The information presented in this chapter shows that the emergence of Campylobacter in aquatic environments is a concern in many parts of the world and is driven by several complex factors which may be biological, social, and environmental. This chapter shows evidence of increasing occurrence of Campylobacter spp. and its resistance determinants in different aquatic environments, the detection of Campylobacter spp. in aquatic environments, and factors that may drive its emergence in aquatic ecosystems. Given that aquatic environments serve as sources of water for recreation and domestic consumption, the emergence of Campylobacter spp. presents a considerable risk to public health. The presence of Campylobacter and its antibiotic-resistance genes in aquatic environments poses a high risk of transmission to humans and animals. Furthermore, the chapter highlights the need for comprehensive monitoring, mitigation strategies, and further research to address this emerging environmental concern.