Abstract Morphometric analyses of Kolar river basin has been carried out with various aspects. The linear, areal and relief aspects of Kolar river basin suggest that river basin has elongated shape with impermeable sub-surface, low infiltration and fine drainage texture. Values of ruggedness number fall in higher range; hence basin is more susceptible to erosion. Morphometric values infer that the Kolar river basin has, sparse vegetation cover, high relief. Present study has confirmed the prevalence of dendritic drainage pattern, highest of 6th order stream and linear relationship between stream order and stream number. This also suggests that the runoff is low and lower degree of dissection. With high values of overland flow, water will take more time to enter the stream. Values of Hypsometric Integral (HI) confirmed that the Kolar river basin is of mature stage. Hence area is less prone to flooding. High bifurcation value of suggest that, the 3rd, 4th and 5th order stream have strong structural control over them. Elongation ratio values verify that basin is tectonically active.