Military Units Formed in Missouri

UNION UNITS

1st Battalion, US Reserve Corps, Missouri Cavalry (Union)
1st Regiment, Missouri Light Artillery (Union)
1st Flying Battery, Missouri Light Artillery (Union)
1st Regiment, Enrolled Militia, Missouri National Guard Infantry (Union)
1st Battalion, Fremont Rangers, Missouri Home Guard (Union)
1st Regiment, Missouri Cavalry (Union)
1st Regiment, Missouri Infantry (3 months 1861) (Union)
1st Regiment, US Reserve Corps, Missouri Infantry (3 months, 1861) (Union)
1st Regiment, US Reserve Corps, Missouri Infantry (Union)
1st Northeast Cavalry Regiment, Missouri Home Guard (Union)
1st Regiment, US Reserve Corps, Missouri Home Guard (Union)
1st Regiment, Pioneers, Engineers and Mechanics, Missouri Home Guard (Union)
1st Northeast Regiment, Missouri Home Guard (Union)
1st Division, US Reserve Corps, Missouri Home Guard (Union)
1st Rifle Battalion, Missouri Infantry (Union)
1st Regiment, Missouri State Militia Infantry (Union)
1st Regiment, Missouri Engineers (Union)
1st Battalion, Missouri State Militia Cavalry (Union)
1st Regiment, Missouri State Militia Cavalry (Union)
1st Battalion, Cass County, Missouri Home Guard (Union)
2nd Regiment, Missouri State Militia Cavalry (Union)
2nd Regiment, US Reserve Corps, Missouri Infantry (Union)
2nd Northeast Regiment, Missouri Home Guard (Union)
2nd Regiment, Missouri Light Artillery (Union)
2nd Regiment, Missouri Cavalry (Merrill's Horse) (Union)
2nd Regiment, US Reserve Corps, Missouri Infantry (3 months, 1861) (Union)
2nd Regiment, Missouri Infantry (3 months, 1861) (Union)
2nd Battalion, Missouri State Militia Cavalry (Union)
2nd Regiment, Missouri Infantry (Union)
3rd Regiment, Missouri Cavalry (Union)
3rd Regiment, Missouri Infantry (Union)
3rd Regiment, US Reserve Corps, Missouri Infantry (3 months 1861) (Union)
3rd Regiment, Missouri Infantry (3 months, 1861) (Union)
3rd Regiment, Missouri State Militia Cavalry (1st Organization) (Union)
3rd Regiment, US Reserve Corps, Missouri Infantry (Union)
3rd Regiment, Missouri State Militia Cavalry (2nd Organization) (Union)
4th Regiment, Missouri Cavalry (Union)
4th Regiment, Missouri Infantry (3 months, 1861) (Union)
4th Regiment, Missouri Infantry (Union)
4th Regiment, Missouri State Militia Cavalry (Union)
4th Regiment, US Reserve Corps, Missouri Infantry (3 months, 1861) (Union)
4th Regiment, US Reserve Corps, Missouri Infantry (Union)
5th Regiment, Missouri State Militia Cavalry (2nd Organization) (Union)
5th Regiment, Missouri Infantry (3 months, 1861) (Union)
5th Regiment, Missouri Home Guard (Union)
5th Regiment, US Reserve Corps, Missouri Infantry (3 months, 1861) (Union)
5th Regiment, US Reserve Corps, Missouri Infantry (Union)
5th Regiment, Missouri Infantry (Union)
5th Regiment, Missouri Cavalry (Union)
5th Regiment, Missouri State Militia Cavalry (Union)
6th Regiment, Missouri Cavalry (Union)
6th Regiment, Missouri State Militia Cavalry (Union)
6th Regiment, Missouri Infantry (Union)
7th Regiment, Missouri Cavalry (Union)
7th Regiment, Missouri Infantry (Union)
7th Regiment, Missouri State Militia Cavalry (Union)
8th Regiment, Missouri Cavalry (Union)
8th Regiment, Missouri Infantry (Union)
8th Regiment, Missouri State Militia Cavalry (Union)
9th Regiment, Missouri State Militia Cavalry (Union)
9th Regiment, Missouri Cavalry (Union)
9th Regiment, Missouri Infantry (Union)
10th Regiment, Missouri Cavalry (Union)
10th Regiment, Missouri Infantry (Union)
11th Regiment, Missouri Cavalry (Union)
11th Regiment, Missouri Infantry (Union)
11th Regiment, Missouri State Militia Cavalry (Union)
12th Regiment, Missouri Cavalry (Union)
12th Regiment, Missouri State Militia Cavalry (Union)
12th Regiment, Missouri Infantry (Union)
13th Regiment, Missouri Cavalry (Union)
13th Regiment, Missouri Infantry (Union)
14th Regiment, Missouri State Militia Cavalry (Union)
14th Regiment, Missouri Cavalry (Union)
14th Regiment, Missouri Home Guard (Union)
15th Regiment, Missouri Infantry (Union)
15th Regiment, Missouri Cavalry (Union)
15th Regiment, US Reserve Corps, Missouri Home Guard (Union)
16th Regiment, Missouri Cavalry (Union)
16th Regiment, Missouri Infantry (Union)
17th Regiment, Missouri Infantry (Union)
18th Regiment, Missouri Infantry (Union)
18th Regiment, Missouri Cavalry (Union)
19th Regiment, Missouri Infantry (Union)
20th Regiment, Missouri Infantry (Union)
21st Regiment, Missouri Infantry (Union)
21st Regiment, Missouri State Militia Cavalry (Union)
22nd Regiment, Missouri Infantry (Union)
23rd Regiment, Missouri Infantry (Union)
24th Regiment, Missouri Infantry (Union)
25th Regiment, Missouri Infantry (Union)
26th Regiment, Missouri Infantry (Union)
27th Regiment, Missouri Infantry (Union)
27th Regiment, Missouri Mounted Infantry (Union)
29th Regiment, Missouri Infantry (Union)
30th Regiment, Missouri Infantry (Union)
31st Regiment, Missouri Infantry (Union)
32nd Regiment, Missouri Infantry (New) (Union)
32nd Regiment, Missouri Infantry (Union)
33rd Regiment, Missouri Infantry (Union)
34th Regiment, Missouri Infantry (Union)
35th Regiment, Missouri Infantry (Union)
36th Regiment, Missouri Infantry (Union)
37th Regiment, Missouri Infantry (Union)
38th Regiment, Missouri Infantry (Union)
39th Regiment, Missouri Infantry (Union)
40th Regiment, Missouri Infantry (Union)
41st Regiment, Missouri Infantry (Union)
42nd Regiment, Missouri Infantry (Union)
43rd Regiment, Missouri Infantry (Union)
44th Regiment, Missouri Infantry (Union)
45th Regiment, Missouri Infantry (Union)
46th Regiment, Missouri Infantry (Union)
47th Regiment, Missouri Infantry (Union)
48th Regiment, Missouri Infantry (Union)
49th Regiment, Missouri Infantry (Union)
50th Regiment, Missouri Infantry (Union)
51st Regiment, Missouri Infantry (Union)
52nd Regiment, Missouri Infantry (Union)
54th Regiment, Missouri Infantry (Union)
56th Regiment, Missouri Infantry (Union)
63rd Regiment, Enrolled Militia, Missouri Infantry (60 days 1864) (Union)
Adair County, Missouri Home Guard (Union)
Alexandria Cavalry Regiment, Missouri Home Guard (Union)
US Arsenal, Saint Louis, Missouri (Union)
Backof's Battalion, Missouri Artillery (3 months, 1861) (Union)
Bailey's Company I, Missouri Home Guard Regiment (Union)
Balz's Company, Missouri Sappers and Miners (Union)
Benton Cadets, Missouri Infantry (Union)
Berry's Battalion, Missouri Cavalry (Union)
Birge's Sharpshooters, Missouri Home Guard (Union)
Bolander's Independent Company, Missouri Home Guard (Union)
Boonville, Missouri Home Guard (Union)
Boonville Reserve Corps Regiment, Missouri Home Guard (Union)
Budd's Independent Company, Fremont Rangers, Missouri Home Guard (Union)
Buell's Battery, Missouri Light Artillery (Union)
Bullis' Battery, Missouri Light Artillery (Union)
Burrows' Company B, Missouri Home Guard Regiment (Union)
Caldwell County, Missouri Home Guard (Union)
Cape Giradeau Battalion, Missouri Home Guard (Union)
Carondelet Regiment, US Reserve Corps, Missouri Home Guard (Union)
Cass County Home Guard, Missouri Cavalry (Union)
Post Chaplain, Fort Scott, Kansas (Union)
Clark's Independent Cavalry Company, Missouri Home Guard (Union)
Clinton County, Missouri Home Guard (Union)
Cook's Company, Missouri Home Guard Infantry (Union)
Crandall's Company, Reserve Corps, Missouri Home Guard (Union)
Dade County, Missouri Home Guard (Union)
Dallas County Regiment, Missouri Home Guard (Union)
De Soto, Missouri Home Guard (Union)
Dietrich's Company, US Reserve Corps, Missouri Infantry (Union)
Douglas County, Missouri Home Guard (Union)
Dougherty's Company A, Missouri Home Guard Cavalry Regiment (Union)
Elliott's Company A, Missouri Home Guard Regiment (Union)
Engineer Regiment of the West, Missouri Volunteers (Union)
Filler's Company E, Missouri Home Guard Regiment (Union)
Forman's Independent Company, Reserve Corps, Missouri Home Guard (Union)
Foster's Company, Independent Scouts and Guides, Missouri Home Guard (Union)
Franklin County Reserve Corps Regiment, Missouri Home Guard (Union)
Fremont's Body Guard, Missouri Cavalry (Union)
Fuch's Company D, Missouri Home Guard Regiment (Union)
Gasconade County Battalion, US Reserve Corps, Missouri Home Guard (Union)
Gasconade County Regiment, Missouri Home Guard (Union)
Gatton's Company F, Missouri Home Guard Regiment (Union)
Gentry County Regiment, Missouri Home Guard (Union)
German Regiment, Missouri Home Guard (Union)
General Hospital, Benton Barracks, Missouri (Union)
Graham's Company, Missouri Cavalry (Union)
Greene County Regiment, Missouri Home Guard (Union)
Harrison County Regiment, Missouri Home Guard (Union)
Hickory County Battalion, Osage County Regiment, Missouri Home Guard (Union)
Holland's Company, Missouri Home Guard (Union)
Holrah's Company M, Missouri Home Guard Regiment (Union)
Home Guard (Union)
Military Hospital (Union)
Hoven's Company N, Missouri Home Guard Regiment (Union)
Jende's Company B, Missouri Home Guard Regiment (Union)
Jenning's Company D, Missouri Home Guard Regiment (Union)
Johnson County, Missouri Home Guard (Union)
Kingston County, Missouri Home Guard (Union)
King's Company, Railroad Patrol Guard, US Reserve Corps, Missouri Infantry (Union)
Knowald's Battery, Missouri Light Artillery (Union)
Krekel's Battalion, US Reserve Corps, Missouri Infantry (Union)
Landgraeber's Battery, 1st Horse Artillery (Union)
Livingston County Regiment, Missouri Home Guard (Union)
Lumper's Company G, Missouri Home Guard Regiment (Union)
Mann's Battery, Missouri Light Artillery (Union)
Marion Battalion, Missouri Home Guard (Union)
Marten's Company, Missouri Home Guard (Union)
Mattley's Company D, Cavalry Regiment, Missouri Home Guard (Union)
McCollum's Independent Company, Missouri Home Guard (Union)
Moore's Cavalry Regiment, Missouri Home Guard (Union)
Murphy's Independent Company, Missouri Home Guard (Shoal Creek Rangers) (Union)
Nevill's Regiment, Missouri Home Guard (Union)
New's Company A, Missouri Home Guard Regiment (Union)
Newstadter's Company H, Missouri Home Guard Regiment (Union)
Nodaway County Regiment, Missouri Home Guard (Union)
Ordnance Department, St. Louis, Missouri (Union)
Osage County Battalion, Missouri Home Guard (Union)
Osage County Regiment, Missouri Home Guard (Union)
Ozark County, Missouri Home Guard (Union)
Pacific Battalion, Missouri Home Guard (Union)
Pacific Regiment, US Reserve Corps, Missouri Home Guard (Union)
Pettis County, Missouri Home Guard (Union)
Phelps' Regiment, Missouri Infantry (6 months, 1861) (Union)
Phelps County Regiment, Missouri Home Guard (Union)
Pike County Regiment, Missouri Home Guard (Union)
Potosi Regiment, Missouri Home Guard (Union)
Potthoff's Independent Company, Missouri Home Guard (Union)
Pritchard's Company, Missouri Home Guard (Union)
Pulaski Regiment, Missouri Home Guard (Union)
Putnam County, Missouri Home Guard (Union)
Post Quartermaster, Kansas City, Missouri (Union)
Post Quartermaster, Linn Creek, Missouri (Union)
Richardson's Company, Spies, Scouts and Messengers, Missouri Home Guard (Union)
Rogers' Independent Company, Missouri Home Guard (Union)
Sappers and Miners, Missouri Volunteers (3 months, 1861) (Union)
Schemmer's Company E, Missouri Home Guard Regiment (Union)
Schmitz's Independent Company, Missouri Home Guard (Union)
Scott County Battalion, US Reserve Corps, Missouri Home Guard (Union)
Sexton's Independent Company, Stone Prairie, Missouri Home Guard (Union)
Shawneetown, Missouri Home Guard (Union)
Sheldon's Battery, Missouri Light Artillery (Union)
Smallwood's Company, Scouts and Guides, Missouri Cavalry (3 months, 1861) (Union)
Smith's Regiment, Missouri Home Guard (Union)
Sobolaski's Lancers, Missouri Cavalry (Union)
Spilman's Company C, Missouri Home Guard Regiment (Union)
Stewart's Battalion, Missouri Cavalry (Union)
Stone County Regiment, Missouri Home Guard (Union)
Straatman's Company F, Missouri Home Guard Regiment (Union)
Post Surgeon, Jefferson City, Missouri (Union)
Sullivan County, Missouri Home Guard (Union)
Telegraph Corps, Missouri Volunteers (Union)
Unassigned Volunteers (Union)
Van Horn's Battalion, US Reserve Corps, Missouri Infantry (Union)
Wachman's Battery, Missouri Light Artillery (Union)
Webster County Battalion, Missouri Home Guard (Union)
Webster County Regiment, Missouri Home Guard (Union)
Welfley's Battery, Missouri Light Artillery (Union)
Western Sharpshooters, Missouri Home Guard (Union)
Windmuller's Company K, Missouri Home Guard Regiment (Union)

The exact number of military units which were formed in Missouri is unknown. Some units changed names and / or were consolidated or reoganized during the war and a few were disbanded without seeing service.

This list contains 548 known discreet units and is based on the inventory made by the National Archives of the various rosters and service records.