The 4d transition metal oxide BaZrO3 is a perovskite compound that is widely utilized in the commercial industry. Recently, the fundamental understanding of BaZrO3 has been also attracted from both the theoretical and experimental sides. However, its high melting temperature (∼2650 °C) prevents to investigate and understand the fundamental physical properties of the single crystal forms of BaZrO3. Here, we report the temperature dependence of the dielectric properties of BaZrO3 single crystal from 2 K to 400 K, which is grown by the optical floating zone method.