In this work, silver nanoparticles decorated polyaniline-nanocrystalline zeolite organicinorganic hybrid material was synthesized. Material was characterized by the complementary combination of X-ray diffraction, N 2 -adsorption, scanning/transmission electron microscopy, and thermo gravimetric analysis. An electrochemical sensor based on silver nanoparticles decorated polyaniline-nanocrystalline zeolite was developed for the nanomolar detection of lindane in aqueous-methanol with high electro-catalytic activity, stability, sensitivity, and selectivity. The sensor exhibited a wide linear range from 10 nM-900 µM with a limit of detection of 5 nM under the optimum conditions. The analytical performance of the developed sensor was demonstrated for the determination of lindane in different water bodies with satisfactory recovery.