This paper studies the effect of rock type on concrete dynamic behavior. A three-dimensional concrete meso-model is developed. In the meso-model, concrete is considered a heterogeneous material consisting of three phases, i.e., aggregate, mortar, and interfacial transition zone. Four different types of rock materials are considered for the aggregate present in concrete, i.e., granite, quartzite, quartzite gneiss, and phyllite. Each model is studied for 22 strain rate conditions varying from 1 to 1000 s−1. The strain rates adopted in this paper for finite element numerical simulation are 1, 10, 50, and up to 1000 s−1 with an increment of 50 s−1. The developed model is verified for both loading conditions, i.e., quasi-static and dynamic loading (high-strain loading rate) conditions, using the results available in the literature. The concrete model is analyzed for mortar, and ITZ strength of 35 and 28 MPa, respectively, whereas the aggregate strength depends on the type of aggregate. Variation in strength is observed with the change in the aggregate type. The increase in quasi-static and dynamic strength is found to be 3.79% and 13.8%, respectively. Finally, the effect of aggregate rock type on concrete dynamic behavior is also studied.