The ternary semiconducting oxide Zinc Stannate (ZnSnO3) has recently drawn considerable interest in the research community owing to its potential applications in gas sensors, electronic devices, solar cells, plating additives, etc., The hydrothermal method has been established as an effective route due to its operational simplicity, cost-efficiency and continuous productions potential compared with other methods. The present work reports facile hydrothermal synthesis of ZnSnO3 nanoparticles and it was characterized by XRD, UV, FTIR, SEM and dielectric study. X-ray diffractogram provides the structural property of ZnSnO3 and average crystallite size was calculated as 41.87nm. The FTIR analysis confirms the function group of ZnSnO3. The morphology was analyzed using SEM micrographs and it exhibit cubic structure. Dielectric constant and dielectric loss was observed to be decrease when frequency increases for the synthesized ZnSnO3 nanoparticles.