Flexible electrodes for aqueous hybrid supercapacitors (AHSs) are crucial for the development of flexible and wearable electronic devices. AHSs, composed of pseudocapacitive or battery-type materials with a positive voltage window and capacitive carbon materials with a negative voltage window, offer high energy and power densities, long cycling lifespans, and low costs. Recent advances in flexible electrode materials, including porous metal supports, carbon substrates, and other flexible materials, have led to electrodes with unique configurations and optimized interfacial structures, resulting in excellent electrochemical performance and mechanical stability. However, optimizing electrode configurations and interfacial interactions remains a challenge. Future directions include developing compressible, ultralight, or transparent flexible electrodes, tailoring interfacial properties for robust adhesion, advancing in situ characterization techniques, optimizing electrode materials, and designing multifunctional electrodes. Flexible AHSs are promising for digital electronics, electric vehicles, and other applications. Challenges include low mechanical strength, sluggish charge transport, difficulty in shaping electrodes, and limited collector options. To address these, flexible electrodes are constructed by anchoring electroactive materials on novel conductive substrates, which offer good electrical conductivity, bendability, and structural stability. These electrodes simplify preparation processes, avoid "dead volume/surface" issues, and enable lightweight, ultrathin, and deformable AHSs. Flexible electrodes for AHSs are a rapidly growing and promising research area with increasing attention.Flexible electrodes for aqueous hybrid supercapacitors (AHSs) are crucial for the development of flexible and wearable electronic devices. AHSs, composed of pseudocapacitive or battery-type materials with a positive voltage window and capacitive carbon materials with a negative voltage window, offer high energy and power densities, long cycling lifespans, and low costs. Recent advances in flexible electrode materials, including porous metal supports, carbon substrates, and other flexible materials, have led to electrodes with unique configurations and optimized interfacial structures, resulting in excellent electrochemical performance and mechanical stability. However, optimizing electrode configurations and interfacial interactions remains a challenge. Future directions include developing compressible, ultralight, or transparent flexible electrodes, tailoring interfacial properties for robust adhesion, advancing in situ characterization techniques, optimizing electrode materials, and designing multifunctional electrodes. Flexible AHSs are promising for digital electronics, electric vehicles, and other applications. Challenges include low mechanical strength, sluggish charge transport, difficulty in shaping electrodes, and limited collector options. To address these, flexible electrodes are constructed by anchoring electroactive materials on novel conductive substrates, which offer good electrical conductivity, bendability, and structural stability. These electrodes simplify preparation processes, avoid "dead volume/surface" issues, and enable lightweight, ultrathin, and deformable AHSs. Flexible electrodes for AHSs are a rapidly growing and promising research area with increasing attention.