<p>A cesium-doped zinc sulfate hexahydrate (CZSH) single crystal was successfully grown by the slow evaporation solution growth technique. The grown crystal was characterized using SCXRD, SEM, XPS, TG–DTA, UV–Visible spectroscopy, and dielectric studies to evaluate its structural, optical, thermal, and electrical properties. SCXRD analysis confirmed the crystalline nature of the material, while SEM micrographs revealed compact morphology with uniform grain distribution. XPS analysis verified the presence of Zn, O, Cs, S, and C elements, confirming successful cesium incorporation into the zinc sulfate hexahydrate lattice. Thermal studies revealed that the CZSH crystal undergoes dehydration in the temperature range of 120–190&#xa0;°C, followed by gradual multistep thermal decomposition, indicating the presence of thermally stable residual phases at elevated temperatures. The optical conductivity and electrical conductivity were derived from the UV–Visible absorption data using standard theoretical relations. The calculated values were found to be 4 × 10¹¹&#xa0;S&#xa0;m⁻¹ and 6.5 × 10¹¹&#xa0;S&#xa0;m⁻¹, respectively. These values represent derived optical parameters and provide information regarding the optical response and charge-transport behavior of the CZSH crystal. Dielectric measurement revealed frequency-dependent dielectric behavior with low dielectric loss at higher frequencies. The conductivity and activation energy analyses confirmed thermally activated charge transport within the crystal lattice. The obtained results suggest that the CZSH crystal is a promising material for optical and dielectric applications and warrants further investigation for potential photonic and optoelectronic uses.</p>