In this paper, we present a novel approach to enhancing the visible light photodetection efficiency of reduced graphene oxide (rGO) by incorporating polypyrrole (Ppy) nanoparticles sized between 126 nm and 1 025 nm. The rGO and Ppy nanoparticles were synthesized via Hummer’s method and chemical polymerization, respectively. Characterization was performed using scanning electron microscope (SEM), transmission electron microscope (TEM), Raman spectroscopy, and optical measurements. The rGO/Ppy photodetector demonstrated a high photoresponsivity of 15 mA/W and a broad spectral response from 405 nm to 805 nm, indicating improved efficiency and versatility. This study highlights the potential of tailored Ppy nanoparticle sizes in advancing rGO photodetectors for high-performance optoelectronic applications.