A nanocomposite of N and S co-doped TiO₂ –WO₃ exhibit enhanced visible light photocatalytic activity for the degradation of methyl orange compared to undoped TiO₂ –WO₃ composite, WO₃ and TiO₂. Though, the TiO₂–WO₃ composite has been reported earlier, the effect of anionic doping of TiO₂ –WO₃ with both N and S on the photocatalytic activity is not reported so far. A significant increase in visible light absorption is observed after N and S co-doping due to the decrease of the bandgap energy as a result of doping. In the composite, TiO₂ exists as anatase phase and WO₃ exists as monoclinic phase. This nanocomposite has a particle size of 20–30 nm. XPS results indicate that in the doped samples, anionic substitution of both N and S occurs and substitute for oxygen in the lattice. The nanocomposite catalyst is found to be stable for repeated use. The enhanced photocatalytic activity is attributed to the increased visible light absorption and better separation of photogenerated charge carriers in the doped composite catalyst.