In present work we have synthesized ZrO₂ thick and thin film by different techniques. Prepared ZrO₂ thick and thin films were investigated by different analytical techniques such as XRD, FESEM, FETEM, and UV-Visible spectral studies. From these studies, it was observed that the size of the synthesized films is found within 25 nm and 7 nm crystallite sizes for thick and thin film respectively. Crystanality, grain size, band gap, activation energy and other for both films were discussed, interpreted and reported. Comparative studies in all aspects were presented in this work.