A reference document for US Army Social Media pages. These are official pages only, not reunion pages or otherwise. I only went down to battalion level, I did observe that there are some company/troop level pages also below battalion level.
You can usually find some good equipment/reference photos on these pages.
Only Facebook pages at this time, I will add Instagram/Twitter/Youtube pages when I get the time. I will also update with other units as I can.
1st INFANTRY DIVISION
1st Infantry Division
1st Armored Brigade Combat Team, 1st Infantry Division
1/4 CAV
1/16 INF
2/34 ARM
3/66 ARM
1/5 FA
1st Brigade Engineer Battalion
2nd Armored Brigade Combat Team, 1st Infantry Division
5/4 CAV
1/18 INF
1/63 ARM
2/70 ARM
1/7 FA
82nd Brigade Engineer Battalion
1st Infantry Division Artillery
1st Combat Aviation Brigade, 1st Infantry Division
1/1 Aviation (Attack)
1/6 CAV
2/1 Aviation (General Support)
3/1 Aviation (Assault)
2nd INFANTRY DIVISION
2nd Infantry Division
2nd Infantry Division Artillery
210th Field Artillery Brigade
6/37 FA
1/38 FA
2nd Combat Aviation Brigade
5/17 CAV
2/2 Aviation (Assault)
3/2 Aviation (General Support)
4/2 Aviation (Attack)
3rd INFANTRY DIVISION
3rd Infantry Division
1st Armored Brigade Combat Team, 3rd Infantry Division
5/7 CAV
2/7 INF
1/64 ARM
3/69 ARM
1/41 FA
10th Brigade Engineer Battalion
2nd Armored Brigade Combat Team, 3rd Infantry Division
6/8 CAV
3/15 INF
3/67 ARM
2/69 ARM
1/9 FA
9th Brigade Engineer Battalion
3rd Infantry Division Artillery
3rd Combat Aviation Brigade
3/17 CAV
2/3 Aviation (General Support)
4/3 Aviation (Assault)
4th INFANTRY DIVISION
4th Infantry Division
1st Stryker Brigade Combat Team, 4th Infantry Division
2/1 CAV
4/9 INF
2/23 Infantry
1/38 INF
2/12 FA (no page)
299th Brigade Engineer Battalion
2nd Stryker Brigade Combat Team, 4th Infantry Division
3/61 CAV
1/12 INF
2/12 INF
1/41 INF
2/77 FA
52nd Brigade Engineer Battalion
3rd Armored Brigade Combat Team, 4th Infantry Division
4/10 CAV
1/8 INF
1/66 ARM
1/68 ARM
3/29 FA
588th Brigade Engineer Battalion
4th Infantry Division Artillery
4th Combat Aviation Brigade
6/17 CAV
2/4 Aviation (General Support)
3/4 Aviation (Assault)
4/4 Aviation (Attack)
7th INFANTRY DIVISION
7th Infantry Division
1st Stryker Brigade Combat Team, 2nd Infantry Division
1/14 CAV
2/3 INF
5/20 INF
1/23 INF
1/37 FA
23rd Brigade Engineer Battalion
2nd Stryker Brigade Combat Team, 2nd Infantry Division
8/1 CAV
2/1 INF
1/17 INF
4/23 INF
2/17 FA
14th Brigade Engineer Battalion
16th Combat Aviation Brigade, 7th Infantry Division
4/6 CAV
1/229 Aviation (Attack)
2/158 Aviation (Assault)
1/52 Aviation (General Support)
10th MOUNTAIN DIVISION
10th Mountain Division
1st Infantry Brigade Combat Team, 10th Mountain Division
3/71 CAV
2/22 INF
1/32 INF
1/87 INF
3/6 FA
7th Brigade Engineer Battalion
2nd Infantry Brigade Combat Team, 10th Mountain Division
1/89 CAV
2/14 INF
4/31 INF
2/87 INF
2/15 FA
41st Brigade Engineer Battalion
3rd Infantry Brigade Combat Team, 10th Mountain Division
3/89 CAV
2/2 INF
2/4 INF
2/30 INF
5/25 FA
317th Brigade Engineer Battalion
10th Combat Aviation Brigade, 10th Mountain Division
6/6 CAV
1/10 Aviation (Attack)
2/10 Aviation (Assault)
3/10 Aviation (General Support)
11th AIRBORNE DIVISION
11th Airborne Division
1st Infantry Brigade Combat Team, 11th Airborne Division
5/1 CAV
1/5 INF
1/24 INF
2/8 FA
70th Brigade Engineer Battalion
2nd Infantry Brigade Combat Team (Airborne), 11th Airborne Division
1/40 CAV
1/501 INF
3/509 INF
2/377 FA
6th Brigade Engineer Battalion
Aviation Task Force, 11th Airborne Division (No Page)
1/25 Aviation (Attack)
1/52 Aviation (General Support)
25th INFANTRY DIVISION
25th Infantry Division
2nd Infantry Brigade Combat Team, 25th Infantry Division
2/14 CAV
1/21 INF
1/27 INF
1/151 INF (Indiana NG)
2/11 FA
65th Brigade Engineer Battalion
3rd Infantry Brigade Combat Team, 25th Infantry Division
3/4 CAV
2/27 INF
2/35 INF
100/442 INF (No Page)
3/7 FA
29th Brigade Engineer Battalion
25th Infantry Division Artillery
25th Combat Aviation Brigade
2/6 CAV
2/25 Aviation
3/25 Aviation (General Support)
82nd AIRBORNE DIVISION
82nd Airborne Division
1st Infantry Brigade Combat Team, 82nd Airborne Division
3/73 CAV
1/504 INF
2/504 INF
2/501 INF
127th Brigade Engineer Battalion
2nd Infantry Brigade Combat Team, 82nd Airborne Division
1/73 CAV
1/325 INF
2/325 INF
2/508 INF
37th Brigade Engineer Battalion
3rd Infantry Brigade Combat Team, 82nd Airborne Division
5/73 CAV
1/505 INF
2/505 INF
1/508 INF
307th Brigade Engineer Battalion
82nd Airborne Division Artillery (No Page)
1/319 FA
2/319 FA
3/319 FA
82nd Combat Aviation Brigade, 82nd Airborne Division
1/17 CAV
1/82 Aviation (Attack)
2/82 Aviation (Assault)
3/82 Aviation (General Support)
D/82 Aviation
101st AIRBORNE DIVISION (AIR ASSAULT)
101st Airborne Division (Air Assault)
1st ARMORED DIVISION
1st Armored Division
1st Armored Brigade Combat Team, 1st Armored Division
6/1 CAV
2/37 ARM
4/70 ARM
1/36 INF
16th Brigade Engineer Battalion
2nd Armored Brigade Combat Team, 1st Armored Division
1/1 CAV
1/35 ARM
1/37 ARM
1/6 INF
40th Brigade Engineer Battalion
3rd Armored Brigade Combat Team, 1st Armored Division
2/13 CAV
1/67 ARM
1/77 ARM
4/6 INF
2nd Brigade Engineer Battalion
1st Armored Division Artillery
4/1 FA
2/3 FA
4/27 FA
4/60 ADA
Combat Aviation Brigade, 1st Armored Division
3/6 CAV (Attack/Reconnaissance)
1/501 Aviation (Attack/Reconnaissance)
2/501 Aviation (General Support) No Page
3/501 Aviation (Assault)
1st CAVALRY DIVISION
1st Cavalry Division
1/7 CAV
1st Armored Brigade Combat Team, 1st Cavalry Division
2/5 CAV
2/8 CAV
2/12 CAV
C/10 CAV
91st Brigade Engineer Battalion
2nd Armored Brigade Combat Team, 1st Cavalry Division
4/9 CAV
1/5 CAV
1/8 CAV
1/9 CAV
8th Brigade Engineer Battalion
3rd Armored Brigade Combat Team, 1st Cavalry Division
6/9 CAV
2/7 CAV
3/8 CAV
1/12 CAV
3rd Brigade Engineer Battalion
1st Cavalry Division Artillery
3/16 FA
1/82 FA
2/82 FA
6/56 ADA
1st Air Cavalry Brigade, 1st Cavalry Division
7/17 CAV (Attack/Reconnaissance)
1/227 Aviation (Attack)
2/227 Aviation (Assault)
3/227 Aviation (General Support)
E/227 Aviation
2nd CAVALRY REGIMENT
2nd Cavalry Regiment
3rd CAVALRY REGIMENT
3rd Cavalry Regiment
173rd AIRBORNE BRIGADE
173rd Airborne Brigade