The following Union Army units and commanders fought in the Siege of Vicksburg of the American Civil War. The Confederate order of battle is listed separately. Order of battle compiled from the army organization^[1] during the campaign.^[2]

Abbreviations used

Military rank

MG = Major General
BG = Brigadier General
Col = Colonel
Ltc = Lieutenant Colonel
Maj = Major
Cpt = Captain
Lt = Lieutenant
Sgt = Sergeant

Other

Army of the Tennessee

Main article: Army of the Tennessee

MG Ulysses S. Grant, Commanding

General Staff:

Acting Inspector General: BG Jeremiah C. Sullivan
Chief of Transportation: Col Joseph D. Webster
Chief of Staff: Ltc John A. Rawlins

General Headquarters:

Escort: 4th Illinois Cavalry, Company A: Cpt Embury D. Osband
Engineers: 1st Battalion, Engineer Regiment of the West: Maj William Tweeddale
Mississippi Marine Brigade: BG Alfred W. Ellet^[3]
- Mississippi Ram Fleet: Col Charles Rivers Ellet
- 1st Battalion Infantry: Ltc George E. Currie
- 1st Battalion Cavalry: Major James M. Hubbard
- Artillery Battery: Cpt Daniel Walling

IX Corps

Main article: IX Corps (Union Army)

MG John Parke^[4]

Division	Brigade	Regiments and Others
First Division BG Thomas Welsh	1st Brigade Col Henry Bowman	36th Massachusetts: Ltc John B. Norton 17th Michigan: Ltc Constant Luce 27th Michigan: Col Dorus M. Fox 45th Pennsylvania: Col John I. Curtin
	3rd Brigade Col Daniel Leasure	2nd Michigan: Col William Humphrey 8th Michigan: Col Frank Graves 20th Michigan: Ltc W. Huntington Smith 79th New York: Col David Morrison 100th Pennsylvania: Ltc Mathew M. Dawson
	Artillery	Battery D, Pennsylvania Light: Cpt George W. Durell^[5]
Second Division BG Robert B. Potter	1st Brigade Col Simon Goodell Griffin	6th New Hampshire: Ltc Henry H. Pearson 9th New Hampshire: Col Herbert B. Titus 7th Rhode Island: Col Zenas Bliss
	2nd Brigade BG Edward Ferrero	35th Massachusetts: Col Sumner Carruth 11th New Hampshire: Ltc Moses N. Collins 51st New York: Col Charles Le Gendre 51st Pennsylvania: Col John F. Hartranft
	3rd Brigade Col Benjamin C. Christ	29th Massachusetts: Ltc Joseph H. Barnes 46th New York: Col Joseph P. Gerhardt 50th Pennsylvania: Ltc Thomas S. Brenholtz
	Artillery	Battery L, 2nd New York: Cpt Jacob Roemer
	Artillery Reserve	Battery E, 2nd United States: Lt Samuel N. Benjamin

XIII Corps

Main article: XIII Corps (Union Army)

MG John A. McClernand^[6]
MG Edward Ord

Escort

3rd Illinois Cavalry, Company L: Cpt David R. Sparks

Pioneers

Kentucky Engineers (Independent Company): Cpt William F. Patterson

Division	Brigade	Regiments and Others
Ninth Division BG Peter J. Osterhaus	1st Brigade BG Albert L. Lee (w May 19) Col James Keigwin^[7]	118th Illinois: Col John G. Fonda 49th Indiana: Maj Arthur J. Hawhe, Ltc Joseph H. Thornton 69th Indiana: Col Thomas W. Bennett, Ltc Oran Perry 7th Kentucky: Ltc John Lucas, Col Reuben May 120th Ohio: Col Marcus M. Spiegel
	2nd Brigade Col Daniel W. Lindsey	54th Indiana: Col Fielding Mansfield 22nd Kentucky: Ltc George W. Monroe 16th Ohio: Cpt Eli W. Botsford, Maj Milton Mills 42nd Ohio: Ltc Don A. Pardee, Col Lionel A. Sheldon 114th Ohio: Col John Cradlebaugh (w May 22), Ltc John H. Kelly
	Cavalry	2nd Illinois Cavalry (5 companies): Ltc Daniel B. Bush, Jr. 3rd Illinois Cavalry (3 companies): Cpt John L. Campbell 6th Missouri Cavalry (7 companies): Col Clark Wright
	Artillery Cpt Jacob T. Foster	7th Battery, Michigan Light: Cpt Charles H. Lanphere 1st Battery, Wisconsin Light: Lt Oscar F. Nutting
Tenth Division BG Andrew J. Smith Escort 4th Indiana Cavalry, Company C: Cpt Andrew P. Gallagher	1st Brigade BG Stephen G. Burbridge	16th Indiana: Col Thomas J. Lucas, Maj James H. Redfield 60th Indiana: Col Richard Owen 67th Indiana: Ltc Theodore E. Buehler 83rd Ohio: Col Frederick W. Moore 96th Ohio: Col Joseph W. Vance 23rd Wisconsin: Col Joshua James Guppey, Ltc William Freeman Vilas
	2nd Brigade Col William J. Landram	77th Illinois: Col David P. Grier 97th Illinois: Col Friend S. Rutherford, Ltc Lewis D. Martin 130th Illinois: Col Nathaniel Niles 19th Kentucky: Ltc John Cowan, Maj Josiah J. Mann 48th Ohio: Ltc Job R. Parker (w May 22), Col Peter J. Sullivan
	Artillery	Chicago Mercantile Battery, Illinois Light: Cpt Patrick H. White 17th Battery, Ohio Light: Cpt Ambrose A. Blount, Cpt Charles S. Rice
Twelfth Division BG Alvin P. Hovey Escort 1st Indiana Cavalry, Company C: Lt James L. Carey	1st Brigade BG George F. McGinnis	11th Indiana: Ltc William W. Darnall 24th Indiana: Col William T. Spicely 34th Indiana: Col Robert A. Cameron 46th Indiana: Col Thomas H. Bringhurst 29th Wisconsin: Col Charles R. Gill, Ltc William A. Greene
	2nd Brigade Col James R. Slack	87th Illinois: Col John E. Whiting 47th Indiana: Ltc John A. McLaughlin 24th Iowa: Col Eber C. Byam, Ltc John Q. Wilds 28th Iowa: Col John Connell 56th Ohio: Col William H. Raynor
	Artillery	Battery A, 1st Missouri Light: Cpt George W. Schofield 2nd Battery, Ohio Light: Lt Augustus Beach 16th Battery, Ohio Light: Lt Russell P. Twist
Fourteenth Division BG Eugene A. Carr Escort 3rd Illinois Cavalry, Company G: Cpt Enos McPhail, Cpt Samuel S. Marrett	1st Brigade BG William P. Benton Col Henry D. Washburn^[8] Col David Shunk^[9]	33rd Illinois: Col Charles E. Lippincott 99th Illinois: Col George W. K. Bailey, Ltc Lemuel Parke 8th Indiana: Col David Shunk, Maj Thomas J. Brady 18th Indiana: Col Henry D. Washburn, Cpt Jonathan H. Williams 1st United States Infantry (siege guns): Maj Maurice Maloney
	2nd Brigade BG Michael K. Lawler	21st Iowa: Ltc Cornelius W. Dunlap (k May 22), Maj Salue G. Van Anda 22nd Iowa: Col William M. Stone (w May 22), Ltc Harvey Graham (c May 22), Maj Joseph B. Atherton, Cpt James Robertson, Cpt Charles N. Lee 23rd Iowa: Col Samuel L. Glasgow 11th Wisconsin: Col Charles L. Harris, Maj Arthur Platt
	Artillery	Battery A, 2nd Illinois Light: Lt Frank B. Fenton, Cpt Peter Davidson 1st Battery, Indiana Light: Cpt Martin Klauss

XV Corps

Main article: XV Corps (Union Army)

MG William T. Sherman

Chief of Staff: Ltc John Henry Hammond
Chief of Artillery: Maj Ezra Taylor

Division	Brigade	Regiments and Others
First Division MG Frederick Steele	1st Brigade Col Francis H. Manter Col Bernard G. Farrar^[10]	13th Illinois: Col Adam B. Gorgas 27th Missouri: Col Thomas Curley 29th Missouri: Col James Peckham 30th Missouri: Ltc Otto Schadt 31st Missouri: Col Thomas C. Fletcher, Maj Frederick Jaensch, Ltc Samuel P. Simpson 32nd Missouri: Maj Abraham J. Seay
	2nd Brigade Col Charles R. Woods	25th Iowa: Col George A. Stone 31st Iowa: Col William Smyth, Maj Theodore Stimming 3rd Missouri: Ltc Theodore Meumann 12th Missouri: Col Hugo Wangelin 17th Missouri: Col Francis Hassendeubel (mw July 2), Ltc John F. Cramer 76th Ohio: Ltc William B. Woods
	3rd Brigade BG John M. Thayer	4th Iowa: Col James A. Williamson, Ltc George Burton 9th Iowa: Maj Don. A. Carpenter, Cpt Frederick S. Washburn, Col David Carskaddon 26th Iowa: Col Milo Smith 30th Iowa: Col Charles H. Abbott (k May 22), Maj James P. Milliken (mw May 22), Cpt Robert D. Creamer
	Artillery	1st Battery, Iowa Light: Cpt Henry H. Griffiths Battery F, 2nd Missouri Light: Cpt Clemens Landgraeber 4th Battery, Ohio Light: Cpt Louis Hoffmann
	Cavalry	Kane County (Illinois) Independent Company: Lt Thomas J. Beebe 3rd Illinois Cavalry, Company D: Lt Jonathan Kershner
Second Division MG Francis Preston Blair, Jr.	1st Brigade Col Giles A. Smith	113th Illinois: Col George B. Hoge (w May 22), Ltc John W. Paddock 116th Illinois: Col Nathan W. Tupper 6th Missouri: Ltc Ira Boutell, Col James H. Blood 8th Missouri: Ltc David C. Coleman (w May 22), Maj Dennis T. Kirby 13th United States, 1st Battalion: Cpt Edward C. Washington (k May 19), Cpt Charles Ewing (w May 19), Cpt Charles C. Smith
	2nd Brigade Col Thomas Kilby Smith BG Joseph A. J. Lightburn^[11]	55th Illinois: Col Oscar Malmborg 127th Illinois: Col Hamilton N. Eldridge 83rd Indiana: Col Benjamin J. Spooner 54th Ohio: Ltc Cyrus W. Fisher 57th Ohio: Col Americus V. Rice (w May 22), Ltc Samuel R. Mott
	3rd Brigade BG Hugh Boyle Ewing	30th Ohio: Ltc George H. Hildt (w May 22), Col Theodore Jones 37th Ohio: Ltc Louis von Blessing (w May 22), Maj Charles Hipp, Col Edward Siber 47th Ohio: Col Augustus C. Parry 4th West Virginia: Col James H. Dayton
	Artillery	Battery A, 1st Illinois Light: Cpt Peter P. Wood Battery B, 1st Illinois Light: Cpt Samuel E. Barrett, Lt Israel P. Rumsey Battery H, 1st Illinois Light: Cpt Levi W. Hart 8th Battery, Ohio Light: Cpt James F. Putnam
	Cavalry	Thielemann's (Illinois) Battalion, Companies A and B: Cpt Milo Thielemann 10th Missouri Cavalry, Company C: Cpt Daniel W. Ballou, Lt Benjamin Joel
Third Division BG James M. Tuttle	1st Brigade BG Ralph P. Buckland Col William L. McMillen^[12]	114th Illinois: Col James W. Judy 93rd Indiana: Col De Witt C. Thomas 72nd Ohio: Ltc Le Roy Crockett, Maj Charles G. Eaton 95th Ohio: Col William L. McMillen, Ltc Jefferson Brumback
	2nd Brigade BG Joseph A. Mower	47th Illinois: Ltc Samuel R. Baker 5th Minnesota: Col Lucius F. Hubbard 11th Missouri: Col Andrew J. Weber (mw June 29), Ltc William L. Barnum 8th Wisconsin: Col George W. Robbins
	3rd Brigade BG Charles L. Matthies Col Joseph J. Woods^[13]	8th Iowa: Col James L. Geddes 12th Iowa: Col Joseph J. Woods, Ltc Samuel R. Edgington 35th Iowa: Col Sylvester G. Hill
	Artillery Cpt Nelson T. Spoor	Battery E, 1st Illinois Light: Cpt Allen C. Waterhouse 2nd Battery, Iowa Light: Lt Joseph R. Reed
	Unattached cavalry	4th Iowa Cavalry: Ltc Simeon D. Swan

XVI Corps (detachment)

MG Cadwallader C. Washburn

Division	Brigade	Regiments and Others
First Division^[14] BG William Sooy Smith Escort 7th Illinois Cavalry, Company B: Cpt Henry C. Forbes	1st Brigade Col John Mason Loomis Col Sanford J. Stoughton	26th Illinois: Maj John B. Harris 90th Illinois: Col Timothy O'Meara 12th Indiana: Col Reuben Williams 100th Indiana: Ltc Albert Heath
	2nd Brigade Col Stephen G. Hicks	40th Illinois: Maj Hiram W. Hall 103rd Illinois: Col Willard A. Dickerman 15th Michigan: Col John M. Oliver 46th Ohio: Col Charles C. Walcutt
	3rd Brigade Col Joseph R. Cockerill	97th Indiana: Col Robert F. Catterson 99th Indiana: Col Alexander Fowler 53rd Ohio: Col Wells S. Jones 70th Ohio: Maj William B. Brown
	4th Brigade Col William W. Sanford	48th Illinois: Ltc Lucien Greathouse 6th Iowa: Col John M. Corse
	Artillery Cpt William Cogswell	Battery F, 1st Illinois Light: Cpt John T. Cheney Battery I, 1st Illinois Light: Lt William N. Lansing Cogswell's Illinois Battery: Lt Henry G. Eddy 6th Battery, Indiana Light: Cpt Michael Mueller
Fourth Division^[15] BG Jacob G. Lauman	1st Brigade Col Isaac C. Pugh	41st Illinois: Ltc John H. Nale 53rd Illinois: Ltc Seth C. Earl 3rd Iowa: Col Aaron Brown 33rd Wisconsin: Col Jonathan Baker Moore
	2nd Brigade Col Cyrus Hall	14th Illinois: Ltc William Camm (c June 22), Cpt Augustus H. Cornman 15th Illinois: Col George C. Rogers 46th Illinois: Col Benjamin Dornblaser 76th Illinois: Col Samuel T. Busey 53rd Indiana:^[16] Col Walter Q. Gresham
	3rd Brigade Col George E. Bryant Col Amory K. Johnson^[17]	28th Illinois: Maj Hinman Rhodes 32nd Illinois: Col John Logan, Ltc William Hunter 12th Wisconsin: Ltc De Witt C. Poole, Col George E. Bryant
	Cavalry	15th Illinois Cavalry, Companies F and I: Maj James G. Wilson
	Artillery. Cpt George C. Gumbart	Battery E, 2nd Illinois Light: Lt George Lewis Nispel Battery K, 2nd Illinois Light: Cpt Benjamin F. Rodgers 5th Battery, Ohio Light: Lt Anthony B. Burton 7th Battery, Ohio Light: Cpt Silas A. Burnap 15th Battery, Ohio Light: Cpt Edward Spear, Jr.
Provisional Division^[18] BG Nathan Kimball	Engelmann's Brigade Col Adolph Engelmann	43rd Illinois: Ltc Adolph Dengler 61st Illinois: Maj Simon P. Ohr 106th Illinois: Maj John M. Hurt 12th Michigan: Col William H. Graves
	Richmond's Brigade Col Jonathan Richmond	18th Illinois: Col Daniel H. Brush 54th Illinois: Col Greenville M. Mitchell 126th Illinois: Maj William W. Wilshire 22nd Ohio: Col Oliver Wood
	Montgomery's Brigade Col Milton Montgomery	40th Iowa: Col John A. Garrett 3rd Minnesota: Col Chauncey W. Griggs 25th Wisconsin: Ltc Samuel J. Nasmith 27th Wisconsin: Col Conrad Krez

XVII Corps

Main article: XVII Corps (Union Army)

MG James B. McPherson