Developing heteroatom-self-doped porous carbon electrode materials has been revealed to possess advanced electrochemical performances for supercapacitors. Herein, a facile two-step strategy is reported to prepare O-N-S self-doped porous fusiform carbon particles (FCPs) via carbonizing macroscopic-scale hair waste at an appropriate temperature. The as-prepared FCPs present a fusiform shape with a mean width of about 350 nm and a mean length of about 600 nm. Meanwhile, the as-obtained product possesses a typical hierarchical porous structure with a well level of O-N-S self-doped and a high specific surface area of 278 m2 g−1. These unique properties endow the as-obtained FCPs sample with a high specific capacitance of 253 F g−1 at 1 A g−1 in 1 M KOH electrolyte. Moreover, the FCPs and reduced graphene oxide (RGO) respectively acted as negative/positive electrodes to assemble symmetrical supercapacitors. Finally, a high energy density of 14 Wh kg−1 at a power density of 533 W kg−1 in a cyclic reversibly voltage of 0–1.5 V is realized by the as-built FCPs//RGO supercapacitors, and connecting the two supercapacitors in series can power 38 LEDs.