Bulk single crystals of ErPd₂Si₂ with ThCr₂Si₂-type body-centered tetragonal structure have been successfully grown under a purified Ar atmosphere at a velocity of 10 mm/h using a floating zone method with optical radiation heating. The preferred crystal growth direction is close to the [110] orientation with an inclination angle of 15° against the rod axis. The as-grown crystals are Pd-depleted with respect to their nominal stoichiometry ErPd₂Si₂. The crystals contain small Er-oxide particles. The single-crystalline specimen shows antiferromagnetic ordering indicated by a λ-type singularity of the specific heat capacity c_p(T) at T_N=3.4 K. A broad anomaly around 15–20 K in the magnetic contribution to c_p(T) indicates two-level Schottky-type behavior similar to that of PrPd₂Si₂.