This study focuses on the synthesis of ZnWO4/GO: Mn nanocomposite and investigates its structural, optical and mechanical properties. The nanocomposite was synthesized via a co-deposition method using zinc acetate and sodium tungstate precursors, while graphene oxide (GO) was prepared by the Hammer method. The nanocomposite thin film was deposited on a PET substrate using a spin-spray coating technique coupled with ultrasonic irradiation (40 kHz, 100 W). X-ray diffraction (XRD) analysis confirmed the formation of a tetragonal ZnWO4 crystalline phase and the presence of GO. TEM and SEM images showed cubic ZnWO4 nanoparticles with an average diameter of 200 nm on the GO sheets with particle aggregation due to interparticle forces with uniform distribution. Luminescence analysis under 980 nm laser excitation revealed a strong blue emission in the range (400-500 nm) attributed to the electronic transport in ZnWO4 and the Mn+2 doping effect. GO played an important role in enhancing the optical efficiency by modulating the charge recombination pathways. The stress-strain curve of the thin film showed elastic behavior at low strains and strain hardening at higher strains. These results are an important step towards advancing the optical and photocatalytic applications of ZnWO4-based nanocomposites.