Which nerve provides cutaneous innervation to the skin of the angle of the mandible?

Great Auricular nerve originates from the cervical plexus composed of branches of spinal nerves C2 and C3. It provides sensory innervation for the skin over parotoid gland and mastoid process and both surfaces of the outer ear.

It is the largest sensory branch of the cervical plexus and arises mainly from the third cervical nerve. With irregular contributions from the second cervical nerve. It provides sensory innervation for both surfaces of the external ear to a variable extent, the skin over the mastoid process, and above the auricle and most of the skin covering the parotoid gland.

Great auricular nerve.

The great auricular nerve is a branch of the cervical plexus that provides cutaneous innervation to the skin of the ear and skin below the ear, including the angle of the mandible. The auriculotemporal nerve is a branch of the mandibular division of the trigeminal nerve (v3) with two important functions. First, it carries postganglionic parasympathetic fibers to the parotid gland. Second, the auriculotemporal nerve provides sensory innervation to the skin of anterosuperior ear, part of the external auditory meatus, and the temporomandibular joint. The lesser petrosal nerve is not a sensory nerve-it is a branch of the glossopharyngeal nerve that carries preganglionic fibers to the otic ganglia. Finally, the buccal branches and marginal mandibular branches of the facial nerve are motor nerves only-not sensory nerves! The buccal branches of the facial nerve innervate the buccinator and the other muscles of facial expression above the lip. The marginal mandibular branch innervates the muscles of facial expression of the lower lip and chin.