<p>Nanocomposite films of PVC/(x) iron oxide (x = 2.5, 5, and 10 wt.%) were prepared by the solution-casting method. XRD results of pure PVC films and those of PVC containing varying amounts of iron oxides showed no peak at low content, indicating complete dissolution and homogeneous distribution of iron oxides within the polymer matrix. The optical properties of pure and doped PVC films were studied, displaying an improvement in the films’ optical properties with increasing the dopant of iron oxide up to 10 wt.%. Calculations of the investigated films' energy gaps revealed a drop from 4.260&#xa0;eV for pure film (PF0) to 3.928&#xa0;eV for PF10 wt.% film and from 4.019&#xa0;eV for PF0 to 2.858&#xa0;eV for PF10 wt.% film in the direct transition and the indirect transition, respectively. The optical characteristics were ascertained, including the lattice dielectric constant (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({\varepsilon}_{L}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>ε</mi> <mi>L</mi> </msub> </math></EquationSource> </InlineEquation>), the ratio of carrier concentration/effective mass (N/m*), the dispersion energy, both moments (M₋₁) and (M₋₃), E_o, the single oscillator energy, and E_d. The micro-hardness measurements (Hv) of PVC/(x) iron oxide nanocomposites showed increases in hardness with increasing of (x). Also the conductivity of nanocomposites has been increased with increasing the iron oxide concentration. Moreover, magnetic properties of the prepared nanocomposite films were measured. It was noticeable that the Since the magnetic moment (Ms) rose from 0.075 to 1.27&#xa0;emu/g as the iron oxide content grew from 2.5 to 10 weight percent, respectively, it was evident that the magnetic moment (Ms) increased with increasing iron oxide content in the polymer (PVC) matrix. Therefore, the results showed an improvement in the properties of doped films compared to pure one.</p>