The carotid artery sits roughly 1.5 to 2 centimeters (about half an inch to three-quarters of an inch) beneath the skin in most adults, though this varies depending on where along the neck you measure, your body size, and how much tissue lies between the skin and the artery. Ultrasound machines typically use a focal depth of 30 to 40 millimeters to image the carotid artery clearly, which gives a practical sense of the range clinicians work with when locating it.
Where the Carotid Artery Sits in the Neck
You have two common carotid arteries, one on each side of your neck. Each one runs vertically from the chest up toward the jaw, tucked alongside the windpipe and beneath the large neck muscle you can see and feel when you turn your head (the sternocleidomastoid). At roughly the level of your Adam’s apple, each common carotid splits into two branches: the internal carotid, which supplies blood to the brain, and the external carotid, which feeds the face and scalp.
The artery is closest to the surface in the middle portion of the neck, where you can often feel your pulse just by pressing two fingers beside your windpipe. Higher up, near the jaw, the artery angles deeper as it passes behind bone and muscle to enter the skull. Lower down, near the collarbone, it’s protected by thicker layers of muscle and, on the left side, sits deeper because it branches directly off the aorta rather than from a shorter trunk.
What Affects the Depth
Several factors shift how deep the carotid lies beneath the skin in any given person:
- Body size and neck thickness. A person with a thicker neck, whether from muscle or fat, will have more tissue between the skin and the artery. In lean individuals, the carotid can sit as little as 1 centimeter below the surface.
- Age. In children, the carotid artery is closer to the surface and sits in a more medial position within the neck. Research from pediatric imaging studies confirms that younger patients and those with lower body weight have the internal carotid positioned closer to surrounding structures, with less protective tissue separating it from the throat and skin.
- Neck position. Tilting or rotating the head changes the relationship between the artery and overlying muscle. Turning the head to one side can bring the opposite carotid closer to the surface, which is why head positioning matters during medical procedures and ultrasound exams.
- Individual anatomy. Some people have carotid arteries that sit slightly more forward or more lateral than average. These normal variations are one reason ultrasound guidance is standard practice for any procedure near the carotid.
Why the Depth Matters Medically
The carotid artery’s shallow position makes it both accessible and vulnerable. On the accessible side, its proximity to the skin is what allows you to check a carotid pulse during first aid, and it’s why ultrasound can image the artery so effectively using a simple probe pressed against the neck. Carotid ultrasound is one of the most common vascular tests performed, used to check for plaque buildup that could lead to stroke.
On the vulnerability side, the artery’s depth matters during procedures that involve needles near the neck. When doctors place a central line into the internal jugular vein, for instance, the carotid artery lies just deep to and slightly medial to the vein. The two vessels are sometimes nearly overlapping, separated by only millimeters. Accidentally puncturing the carotid during such a procedure is a recognized risk, which is why real-time ultrasound imaging is now the standard approach rather than relying on surface landmarks alone.
How Depth Compares to Other Major Arteries
The carotid is one of the most superficial large arteries in the body. For comparison, the femoral artery in the groin sits at a similar depth of about 2 to 4 centimeters in most adults, while the brachial artery in the upper arm is typically less than 1 centimeter deep. The aorta, by contrast, runs through the center of the chest and abdomen, sitting 10 centimeters or more below the skin surface.
This relatively shallow depth is why the carotid pulse is one of the strongest pulses you can feel, and why neck injuries that penetrate even a short distance can be life-threatening. A wound that reaches just 2 centimeters into the mid-neck has the potential to damage this artery, which carries a large volume of blood to the brain at high pressure.
Feeling Your Own Carotid Pulse
You can locate your own carotid artery by placing your index and middle fingers on the side of your neck, in the soft groove between your windpipe and the large neck muscle. Press gently. You should feel a strong, rhythmic pulse. This spot, roughly halfway between your jaw and collarbone, is where the artery is closest to the surface. Pressing too hard on both sides simultaneously can slow your heart rate or make you feel lightheaded, so only check one side at a time and use light pressure.