This paper proposes a simplified framework for evaluating the seismic performance of a spillway section of a masonry gravity dam using the finite element method. The approach involves numerical modeling of the dam-foundation rock system and performing linear time history analysis, using commercially available software ABAQUS. The hydrodynamic effect of the impounded water on the dam body is consolidated in the two-dimensional finite element model by integrating Westergaard’s added mass theory. The behavior of the system is then assessed through free vibration analysis to determine natural frequencies followed by static and linear time history analyses considering full reservoir conditions. The dynamic analyses consider both horizontal and vertical components of the site-specific estimates of the maximum credible earthquake (MCE) and design basis earthquake (DBE) ground motions. The estimates of the maximum principal stress induced by the combined effect of dynamic (earthquake) and static (hydrostatic pressure and self-weight) loads throughout the dam cross-section are presented in the form of stress contours. The results obtained are discussed to show how such an analysis can be useful in assessing the seismic safety of the spillway portion of a masonry gravity dam vis-à-vis the prevalent safety criteria.