<p>The accumulation of heavy metals in water sources at levels exceeding acceptable limits poses a serious risk to human health and the environment. Various electrochemical methods and electroactive materials have been employed to identify and measure these metal ions. However, effective, low-cost, sensitive, and stability, with low detection limit and high reproducibility, are the major requirements of such sensing materials. In this regard, an enhanced hybrid ternary composite PGT based on polypyrrole, GO, and ZnO (PPY/GO/ZnO) has been fabricated and is reportedly being used for the first time to identify lead (Pb²⁺) ions at the trace level in aqueous solutions. The ternary composite was characterized using Fourier transform-infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA) to study its structural, morphological, and thermal properties. The electrochemical response of the composite material was analyzed using cyclic voltammetry (CV) and electron impedance spectroscopy (EIS) in potassium ferricyanide as a redox probe. The sensitivity, selectivity, and reproducibility of the PGT were studied via the differential pulse anodic stripping voltammetry (DPASV) technique. The electrode material shows a good linear response (<i>R</i>² = ~0.98) with a limit of detection of 0.05 µM for Pb²⁺ ions within the concentration range of 0.3 to 3 µM. The reproducibility RSD (relative standard deviation, 1.089%), stability RSD (3.67%), and interference of the working electrode in the presence of other metal ions (Cd²⁺ and Cu²⁺) show a good response. These results represent the possibilities of employing the PGT electrode to effectively detect other heavy metal ions from aqueous sources.</p>