List of active duty United States four-star officers

There are currently 39 active-duty four-star officers in the uniformed services of the United States: six in the Army, four in the Marine Corps, 10 in the Navy, 12 in the Air Force, four in the Space Force, two in the Coast Guard, and one in the Public Health Service Commissioned Corps. Of the eight federal uniformed services, the NOAA Commissioned Officer Corps is the only service that does not have an established four-star position.

Source: Wikipedia — List of active duty United States four-star officers (CC BY-SA 4.0)