The Hyracodontidae are an extinct family of rhinocerotoids endemic to North America, Europe, and Asia during the Eocene through early Oligocene, living from 48.6 to 26.3 million years ago (Mya), existing about. The Hyracodontidae thrived in the rainforests of Kazakhstan, Pakistan, and southwest China, a former coastal region. Fossil evidence also extends their geographical range to Germany, as well as to Mongolia.