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The peak ground acceleration is an important strong motion parameter for safe engineering design of the structures. Therefore, the zoning based on peak ground acceleration is more useful to predict seismic hazard than any other parameters. The unavailability of strong motion data for different seismically active regions always put hurdle in seismic hazard studies. The alternate approach is the simulation of strong ground motion. Attenuation relationships are commonly used for engineering studies to estimate the peak ground acceleration values. This paper presents the role of attenuation relationship in defining the seismic hazard in an area. It is seen that the seismic hazard in an area, which is calculated using attenuation relationships, is mostly controlled by the type of attenuation relationship used in the study.