According to the Department of Defense (DOD), the United States Armed Forces had 1.33 million people identified as active troops as of 2025. The DOD reported that an additional 770,118 people were serving in the National Guard or as reserves as of 2025. Active-duty Armed Forces personnel in the United States are spread across six main service branches: the Army, the Navy, the Air Force, the Marine Corps, the Coast Guard, and the Space Force. As of December 2025, the Army had more activeduty troops (447,455) than any other branch of the American military.The Navy (339,602) had the second most active-duty troops, while the Air Force (315,317) was the third largest branch in terms of active-duty troops.
