<p>FeS and ZnO have garnered significant attention because of favorable electrochemical properties as supercapacitor electrode substance. The advantages of ZnO are limited because of inadequate cyclic retention and conductivity. Simultaneously, FeS depicts superior theoretical capacity and durable electrical conductivity, making it good alternative for composite electrodes. The (1:1) ratio of FeS/ZnO composite is manufactured, utilizing hydrothermal synthesis and wet chemical approach for supercapacitor electrode material. The composite has a notable specific capacity of 458 Fg⁻¹ at 1 Ag⁻¹ in three-electrode configuration and 85 Fg⁻¹ in two-electrode setup, surpassing the performance of pure FeS, and ZnO electrodes. Furthermore, FeS/ZnO//AC demonstrates capacitance stability of 80% at current density of 3 Ag⁻¹ over 3000 sequential charge-discharge cycles, significantly surpassing 66% and 46% retention of FeS and ZnO. The enhanced specific capacitance of the FeS/ZnO electrode is ascribe to synergistic interaction between Fe²⁺ and Zn²⁺, along with nanoparticles resembling morphology of ZnO, offers considerable surface area for FeS nanoplates, thereby improving conduction process and underscoring the efficiency of the composite FeS/ZnO electrode in ultrachemical capacitors. The existing synthetic methodology is effective and cost-efficient, and may be modified for production of other sulfide-based transition metal oxides with enhanced electrochemical properties for energy storage and conversion.</p>