Zinc-doped manganese ferrite nanoparticles were synthesized using the co-precipitation technique and subsequently annealed at different temperatures (400℃, 600℃, and 700℃). The synthesized samples underwent characterization using several techniques including TG/DTA, XRD, FTIR, SEM, TEM, EDX, XPS, BET, and CV. The sample’s thermal behaviour and decomposition were examined using differential thermal analysis and thermo gravimetric analysis. The crystal structure and phase purity of the nanoparticles were examined using X-ray diffraction (XRD). Fourier transform infrared spectroscopy was used to identify the chemical bonds present in the samples. The surface morphology and particle size of the Mn0.5Zn0.5Fe2O4 nanoparticles, annealed at 700℃, were investigated using scanning electron microscopy and High- Resolution transmission electron microscopy with selected area electron diffraction patterns providing crystal structure and orientation information. Energy dispersive X-ray spectroscopy (EDX) analysis confirmed the presence of manganese, zinc, iron, and oxygen in the synthesized nanoparticles. The specific surface area of the samples was examined using the Brunauer-Emmett-Teller method, providing insights into nanoparticle porosity and surface characteristics. X-ray photoelectron spectroscopy was utilized to measure the binding energy of the samples, yielding information about their electronic structure and chemical composition. Cyclic voltammetry (CV) was employed to analyze the electrochemical properties of the samples, revealing a specific capacitance value of 388.35 Fg-1 at a lower scan rate of 2mVs-1. This high specific capacitance suggests the potential suitability of Mn0.5Zn0.5Fe2O4 nanoparticles for supercapacitor applications.