ZnO nanorods have been successfully synthesized by employing ZnCl2, NaOH as the starting materials without surfactants, template supporting and structure-directing solvent at a low temperature (room temperature – 90 °C ). X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) were used to analyze the crystal structure and surface morphology. XRD pattern analysis showed that the ZnO clusters are single hexagonal phase of wurtzite structure with no impurity of others. Also, TEM images revealed that the size of a single ZnO nanorod is between 32 – 60 nm in diameter and 470 – 740 nm in length. Furthermore, the ZnO nanorods exhibit significant optical properties in Raman spectrum, suggesting that they could be found promising potential for opto-electronic application.