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Single crystals of Dy1−xGdxVO4 with a constant diameter were grown by the Czochralski method. These single crystals are antiferromagnetic in the temperature region below 3 K. The magnetization of the single crystals which have tetragonal symmetry along the a and c axes was measured with a superconducting quantum interference device magnetometer in the paramagnetic temperature region above 3 K. The Jahn–Teller effect for the magnetization on DyVO4 was weakened by the substitution. On the basis of the values of the magnetization, the magnetic entropy change along each crystal axis was estimated for the magnetic refrigeration. Single crystal Dy0.75Gd0.25VO4 is a promising material for the magnetic refrigerants using the Carnot cycle in the temperature range between 4.2 and 20 K.