In this work, the synthesis of cobalt doped zinc ferrites CoxZn1-xFe2O4 for x = 0, 0.1, 0.2 and 0.3 by sol-gel method followed by self-ignition root is reported. The prepared materials in powder form were characterized by HRXRD, FTIR, SEM and VSM analysis for its structural, vibrational and magnetic properties. Single phase cubic structure having fd3m space group of the zinc ferrites was revealed by HRXRD technique. The minimum crystallite size of Co doped ZnFe2O4 was found to be 26.11 nm for x = 0.1. The effect of cobalt in the prepared composites was studied using VESTA and Match3! Software for the structural analysis. The FTIR spectra illustrate two bands in the range 565-544 cm-1 and 431-410 cm-1, which confirm the formation of the spinel ferrite phase. Vibrating sample magnetometer (VSM) was used for magnetic parameters like remanence, coercivity and saturation magnetization, etc. of the prepared nanomaterials.