Hair, a high-nitrogen energetic material, is utilized as a precursor for nitrogen-doped porous carbon. The preparation procedures for obtaining carbon from hair are very simple, namely, reductant or deionized water activation process followed by hair carbonization under argon atmosphere at 800°C for 2h. The samples are characterized through scanning electron microscopy, transmission electron microscopy, X-ray diffraction, nitrogen adsorption, and X-ray photoelectron microscopy. The carbon samples are tested as electrode materials in supercapacitors in a three-electrode system. The carbon (soaked in deionized water at 80°C) presents relatively low specific surface areas (441.34m2 g−1) and shows higher capacitance (154.5F g−1) compared with nitrogen-free commercial activated carbons (134.5Fg−1) at 5Ag−1. The capacitance remains at 130.5Fg−1 even when the current load is increased to 15Ag−1. The capacitance loss is only 5% in 6M KOH after 10,000 charge and discharge cycles at 5Ag−1. It is the unique microstructure after activation processing and electroactive nitrogen functionalities that enable the carbon obtained through a simple, ecological, and economical process to be utilized as a potential electrode material for electrical double-layer capacitors.