Ni2-xCox(WO4)2 and Ni2-xMnx(WO4)2 (x = 0.0, 0.50, 1.0, 1.50 and 2.0) nanocomposites have been synthesized by facile hydrothermal method. The synthesized samples have been characterized by powder XRD and Scanning Electron Microscopy to analyze the structure and morphology. Structural analysis has revealed the single phase formation with wolframite monoclinic system for NiWO4 samples. The calculated crystallite size ranges from 6 to 40 nm for the nanocomposites. Magnetic and dielectric parameters have also been studied. Magnetic susceptibility measurements of each sample have been carried out at room temperature (312 K) by using Sherwood magnetometer. A decrease in susceptibility values has been observed by increase in the concentration of manganese or cobalt in nickel tungstate leading to antiferromagnetic behavior. Dielectric measurements in the frequency range of 6 kHz to 1 MHz have been calculated. The analysis showed that dielectric parameters decrease with increase in frequency.