U.S. military force numbers, by service branch and reserve component 2018

The U.S. Army had the highest number of active duty personnel in 2018, with 471,990 troops. In the same year, the Coast Guard had the fewest number of active duty members, with 41,132.

Army strong

The Army is the largest, oldest, and most senior branch of the U.S. military, and can be traced back to the Continental Army, and was founded in order to fight in the Revolutionary War. The U.S. Army is comprised of the Regular Army, Army National Guard, and Army Reserve, and makes up the land warfare branch of the U.S. military. While General is the highest rank one can achieve within the Army, the U.S. president is the Commander-in-Chief and head of the military overall.

This we’ll defend

America is known the world over for being a strong military power, and Americans tend to have a lot of confidence in the military. The United States might not have the largest military in the world, but it outpaces all other countries in defense spending.

Active and reserve U.S. military force personnel numbers by service branch and reserve component in 2018

Number of military personnel
Army Active Duty471,990
Army National Guard336,388
Navy Active Duty325,395
Air Force Active Duty321,618
Army Reserve288,725
Marine Corps Active Duty185,415
Air National Guard107,469
Marine Corps Reserve102,492
Navy Reserve99,432
Air Force Reserve97,097
Coast Guard Active Duty41,132
Coast Guard Reserve7,705
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Release date

October 2019


United States

Survey time period


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Statistics on "Armed Forces of the United States"

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