The paravertebral cervical ganglia target sympathetic functions of the heart, head, neck, and arm. They consist of the superior, middle, and inferior cervical ganglia. Clinical procedures such as the cervical sympathetic block are commonly used for diagnosis and treatment of chronic pain in the target areas by administering an injection directly to the ganglia. An important consideration during this procedure is the anatomical positioning of the ganglia with respect to cervical spinal levels. Although a number of previous reports have provided general information of anatomical location of the cervical ganglia, considerable variations are noted during our anatomical dissection class. The aim of this cadaveric study is to provide a detailed investigation of anatomical variations of all 3 cervical ganglia. A total of 20 cadavers in the gross lab of Philadelphia College of Osteopathic Medicine were dissected on both sides and morphometric measurements and images were taken. The knowledge of morphometric features of the cervical ganglia may serve as an important guide for the cervical sympathetic block and prevent inadvertent injuries.