This paper deals with some chitosan-based polymer electrolytes doped with NH₄NO₃, NH₄I, LiCF₃SO₃, NH₄CF₃SO₃, LiOAc, NH₄SCN and AgCF₃SO₃. The chitosan-based electrolytes have been prepared by the solution-cast technique. The ionic conductivity of these solid polymer electrolytes has been obtained through calculations involving the bulk resistance from impedance measurements using electrochemical impedance spectroscopy (EIS). Conductivity achieved at   303 K can be as high as 10^-5 S cm^-1 and at elevated temperature ~373 K exceeds 10^-4 S cm^-1. The addition of plasticizers such as oleic acid (OA), palmitic acid (PA), ethylene carbonate (EC) and dimethyl carbonate (DMC) into the electrolytes enhances the conductivity of the polymer films. Conductivity can be enhanced by as much as 2 orders of magnitude in the plasticized systems. Addition of Al₂SiO₅ filler to chitosan-NH₄CF₃SO₃ however decreases conductivity from 1.72 x 10^-6 S cm^-1 to 8.18 x 10^-8 S cm^-1 at 303 K.  The conductivity of the chitosan-based electrolytes is observed to depend on the lattice energy of salt, the dielectric constant of the polymer and plasticizer and viscosity of the plasticizer used. Usually systems with salt that have large ionic radius and lower lattice energy exhibit high conductivity. The effect of anion and cation on conductivity is analyzed for chitosan-NH₄X (where X = SCN, NO₃, I, CF₃SO₃) and chitosan-MCF₃SO₃ (where M = Li, Ag, NH₄) electrolytes, respectively.