The electronic, magnetic, and structural properties were investigated for ZrRhTiZ (Z = Al, Ga) quaternary Heusler compounds by using first-principles calculations framed fundamentally within density functional theory (DFT). The electronic structures obtained revealed that both compounds have half-metallic characteristics by showing 100% spin polarization near the Fermi level. The half-metallicity is robust to the tetragonal distortion and uniform strain of the lattice. The total magnetic moment is 2 µB per formula unit and obeys the Slater-Pauling rule, Mt = Zt − 18 (Mt and Zt represent for the total magnetic moment and the number of total valence electrons in per unit cell, respectively). The ferromagnetic ground state and thermodynamical ground stability of the compound are are supported by relative total energies. The investigated Curie temperatures of the compounds exceed room temperature indicating that these compounds are promising candidates for beyond room temperature spintronics and magneto-electronics applications.