•Mo doped KTP 24 × 18 × 8 mm3 single crystal grown by self flux method.•Powder X-ray diffraction data confirms the structural stability of pure and doped crystals.•The Mo: KTP single crystal shows low ionic conductivity and polarization with a low coercive field. Pure and molybdenum-doped potassium titanyl phosphate (KTP) single crystals were grown using the spontaneous crystallization by self-flux (K6P4O13) method, and their structural, optical, and electrical properties were studied. The structural properties were confirmed using powder XRD analysis, and there is no significant change in the basic crystal structure observed for the Mo doped KTP single crystal. The grown crystals' optical properties were analyzed using the ultraviolet-transmission spectral analysis, and the bandgap energy was calculated. The dielectric constant, dielectric loss, and electrical conductivity of the crystals were measured at different frequencies and temperatures and are discussed. P-E hysteresis loop response of Mo: KTP at different applied electric fields and temperature shows a low coercivity response. The ferroelectric fatigue analysis shows better homogeneity of the material.