The United States Army currently has ten active, four current Reserve (constantly changing) and eight National Guard divisions for a total of 22.
Each one has a CSM unless they are in-between naming a new one due to many factors, then they would have a SGM acting as CSM until either he or she gets promoted or a new CSM takes over (from another unit or within their own division, normally a brigade CSM or division staff one).
Here's a list:
The United States Army currently has ten active divisions:
1st Infantry Division at Fort Riley, Kansas and in Fort Knox, Kentucky
1st Armored Division at Fort Bliss, Texas
1st Cavalry Division at Fort Hood, Texas
2nd Infantry Division at Camp Red Cloud, South Korea and in Fort Lewis, Washington
3rd Infantry Division at Fort Stewart, Georgia and in Fort Benning, Georgia
4th Infantry Division at Fort Carson, Colorado
10th Mountain Division (Light) at Fort Drum, New York and in Fort Polk, Louisiana
25th Infantry Division at Schofield Barracks, Hawaii, Fort Richardson, Alaska and in Fort Wainwright, Alaska
82nd Airborne Division at Fort Bragg, North Carolina
101st Airborne Division (Air Assault) at Fort Campbell, Kentucky
The United States Army also has eight Divisions within the National Guard:
28th Infantry Division, Fort Indiantown Gap, Pennsylvania
29th Infantry Division, Fort Belvoir, Virginia
34th Infantry Division, Rosemount, Minnesota
35th Infantry Division, Fort Leavenworth, Kansas
36th Infantry Division, Camp Mabry, Texas
38th Infantry Division, Indianapolis, Indiana
40th Infantry Division, Los Alamitos JFTB, California
42nd Infantry Division, Troy, New York
In an attempt to maintain its divisions, the Army Reserve transformed several of its combat divisions into training divisions; these divisions were still designated as infantry divisions until authorized as "divisions (training)" by the adjutant general in 1959.
The United States Army also has four Divisions within the Army Reserve
Next week, next month, next year this could change:
95th Division: 1955–present
100th Division: 1955–present
First Army Division East: 2006–present
First Army Division West: 2006–present
US Army retired vet who served with the 1AD, 1ID, and the 82AD.