Per- and polyfluoroalkyl substances (PFASs) have become a significant concern in recent years as a new type of pollutant due to their ability to accumulate and magnify in the environment and living organisms. When PFASs enter the environment, they can have adverse health effects on humans. Therefore, it is important to monitor and detect PFASs. The current method for detecting PFASs involves using expensive equipment and complex procedures, such as chromatography and mass spectrometry. However, new methods that are simpler and more cost-effective, such as optical and electrochemical techniques, have been developed and applied. These methods have the potential to detect PFASs quickly in real-time, make detection devices smaller, and reduce analysis time. In this review, we summarize recent advancements in PFAS detection sensors. We categorize and explain the principles and mechanisms of these sensors, and compare their limits of detection and sensitivity. Finally, we discuss the future challenges and improvements needed for PFAS sensors, including commercialization and other issues.