This study investigates the structural response of geometrically irregular RC structures by carrying out pushover analysis. Five different geometrical irregular structures have been considered in the study which is assumed to be located in the different seismic zones of the country and vulnerability assessment of these structures subjected earthquake excitation is done. The outcome of the study reveals that seismic zones and geometrically irregular structures plays crucial role when earthquake strikes and hence meticulous considerations has to be given in the geometrically irregular structures.