Organometallic Sodium-2, 3-Dichloro-5, 6-dicyano-p-benzoquinone (Na-DDQ) films were synthesized using a conventional thermal vacuum deposition technique at ambient temperature. DC electrical resistivity was measured over a wide range of thicknesses and temperatures. This helps in investigating the different size-effect parameters, for instance the bulk mean free path (λ o), bulk resistivity (ρ o), grain-boundary transmission coefficient (t), surface scattering factor (p), external surface parameters (U), and grain-boundary parameter (V) in specular and non-specular conditions. The contribution of grain-boundary and surface resistivity to total resistivity was then estimated. Additionally, the AC conductivity (σ ac) and dielectric (ε) behavior of Na-DDQ films were examined at the same temperature in the frequency range (50 Hz-5 MHz). Thus, the temperature dependence of frequency exponent factor (s)