Monte Carlo simulations of electrochemical nucleation and growth have been carried out to demonstrate the specific features of spatial distributions of clusters obtained at different number densities of active sites. Different types of spatial distributions were obtained depending upon the factor dominating the nucleation kinetics : direct exhaustion of active sites or spreading of zones＇ of reduced overpotential. Statistical criteria such as non-dimensional standard deviation (sigma(j)/F-j) and skewness (skew(j)) were used to compare quantitatively the simulated distributions of the distances between nearest and far distant neighbours.