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. (March 2012)
Many Army divisions have over the years earned nicknames; some laudatory, some derogatory, but mostly colorful. Sometimes, the nicknames themselves have overshadowed the actual name of the division, e.g. the "Screaming Eagles" for the 101st Airborne Division.
An official special designation is a "nickname granted to a military organization" which has been authorized by the Center of Military History and recognized through a certificate signed by the Secretary of the Army.
A division's nickname may derive from numerous sources:
- it may be inspired by the division's badge or insignia, such as the 1st Infantry Division's "Big Red One". On the other hand, some division's badges are actually suggested by the nickname, such as the "CY" patch of the "Cyclone Division" (38th Infantry Division);
- it may derive from the place where the division was raised or trained (36th Infantry Division, "Texas"), or the places of origin of the division's soldiers (29th Infantry Division, "Blue and Gray", for northern and southern states);
- it may be bestowed by the enemy in battle, such as the moniker "Red Devils", a nickname for the 5th Infantry Division "granted" by the Germans at the Battle of Saint-Mihiel, World War I;
- it may be the pairing of an adjective (such as "Fighting") paired with the division's ordinal, such as "The Fighting First" for the 1st Infantry Division; or
- it may defy accurate explanation (albeit not without numerous theories), such as the 9th Infantry Division, or "Old Reliables".
Active divisions are listed in boldface; no distinction has been made between regular Army divisions and those of the Army Reserve or National Guard. The origin of the nickname is noted where possible. In some cases, the nickname was officially adopted by the division in question; this is indicated along with date of adoption (where known). Official status might also be inferred by the presence of the nickname on official distinctive unit insignia or in official military source materials.
- 11th Airborne Division – "The Angels"; possibly after their shoulder patch, a white-bordered red circle with a white numeral "11", with white wings rising obliquely from the circle, all on a royal blue field
- 13th Airborne Division – "Golden Unicorns"; taken from their shoulder patch, a winged unicorn in orange on an ultramarine blue, the branch of service colours of the United States Army Air Corps, was approved on 2 June 1943. A gold on black "Airborne" tab was worn above the insignia.
- 17th Airborne Division – "Golden Talon"; taken from their shoulder patch.
- 173rd Airborne Brigade – "Sky Soldiers"; They received their official nickname (Tien Bien translates to Sky Soldiers) from the Taiwanese locals during exercises when they were parachuting in Taiwan. The 173rd was part of the only major conventional airborne operation (Operation Junction City) during Vietnam War.
- 82nd Airborne Division – "America's Guard of Honor", "All-Americans"; original members of the division in 1917 came from every state in the Union. In addition, the 82nd Airborne has been called "Alcoholics Anonymous" in reference to the "AA" on its shoulder patch by members of other divisions.
- 101st Airborne Division – "The Screaming Eagles"; after their shoulder insignia, an American eagle's head on a black shield. During Vietnam, the nicknames "Puking Pigeons" and "One 'o Worst", a comment on their mode of transportation and a play on the official divisional name, were used. Both were used derogatorily by other soldiers, and were not used by the division itself. In addition, the Vietnamese called them the "Chicken Men" since they had never seen a bald eagle. Several regiments within the 101st were nicknamed "The Battered Bastards of Bastogne", due to their part in holding the important crossroads town during the Battle of the Bulge.
- 1st Armored Division – "Old Ironsides" (official, 1941); thought up by its first commander, Major General Bruce R. Magruder, after he saw a picture of the USS Constitution, which bears the same nickname
- 2nd Armored Division – "Hell on Wheels"; Brigadier General George S. Patton, while witnessing it on maneuvers in 1941, reportedly said the division would be "Hell on Wheels" when it met the enemy
- 3rd Armored Division – "Spearhead"; in recognition of the division's role as the "spearhead" of many attacks during the liberation of France in 1944.
- 4th Armored Division
- "Breakthrough" – According to the Center of Military History, the 4th was "sometimes called the 'Breakthrough Division,' but the division never officially pursued the designation, preferring to be 'known by its deeds alone.'"
- "Name Enough"
- "Rolling Fourth"
- 5th Armored Division – "Victory"; probably from the Roman numeral 5, which is a "V" (for "Victory"). 
- 6th Armored Division – "Super Sixth"
- 7th Armored Division – "Lucky Seventh"
- 8th Armored Division
- "Thundering Herd"
- "Iron Deuce"
- "Iron Snake"
- "Show Horse"
- 9th Armored Division –
- 10th Armored Division – "Tiger Division"; so named by Major General Paul Newgarden, the division's first commander, because a tiger has soldierly qualities, including being clean and neat and the ability to maneuver and surprise his prey.
- 11th Armored Division – "Thunderbolt"
- 12th Armored Division – "Hellcat Division" "Suicide Division" The Mystery Division"
- 13th Armored Division – "Black Cat"
- 14th Armored Division – "Liberators"; earned during the last days of World War II when it liberated some 200,000 Allied prisoners of war from German prison camps.
- 20th Armored Division – "Armoraiders"; not official, but the division did associate itself with this nickname while in training at Camp Campbell during World War II
- 27th Armored Division – "Empire"; referring to the fact that it was a New York National Guard unit, after the state's nickname.
- 30th Armored Division – "Volunteers"; referring to the fact that it was a Tennessee National Guard unit, after the state's nickname.
- 40th Armored Division – "Grizzly"; referring to the fact that it was a California National Guard unit, after the state's nickname.
- 48th Armored Division – "Hurricane"
- 49th Armored Division – "Lone Star"; referring to its status as a Texas National Guard formation, after the state's nickname.
- 50th Armored Division – "Jersey Blues"; referring to the fact that it was a New Jersey National Guard unit. This is today's 50th Infantry Brigade Combat Team.
"The Big Red One" of the 1st Infantry Division.
- 1st Infantry Division
- "The Big Red One" – from the division's official shoulder patch: Red numeral "1" on an olive drab shield.
- "The Fighting First"
- "The Big Dead One"
- 2nd Infantry Division
- "Warrior Division" – official nickname
- "Indian Head" – Official as of 1948. From the shoulder patch: an Indian head on a white star superimposed on black shield.
- 3rd Infantry Division
- 4th Infantry Division
- "Ivy" – play on the Roman numeral "IV" ("4"). Also, ivy leaves are symbolic of tenacity and fidelity, the basis of the division's motto, "Steadfast and Loyal".
- "Iron Horse" – official nickname, has been recently adopted to indicate the speed and power of the division
- "Famous Fighting Fourth"
- "Lost Lieutenants" or "4 Lieutenants Pointing North" - a play on the division shoulder sleeve insignia and the stereotype of 2nd Lieutenants being inexperienced and unskilled.
- 5th Infantry Division
- 6th Infantry Division
- 7th Infantry Division
- "Bayonet Division" – this nickname "became synonymous with the division through its participation in the Korean War and symbolizes the fighting spirit of the men of the 7th Infantry division."
- "H-Hour" – Shoulder patch: Red circular patch bearing black hour glass which is formed by an inverted "7" and a superimposed "7".
- 8th Infantry Division
- 9th Infantry Division
- 10th Mountain Division
- 12th Infantry Division
- 23rd Infantry Division
- "Americal" - At one point in time this was the official Divisional designation, when it was redesignated as the 23rd Infantry Division, Americal became the divisional nickname. Originally formed in World War II out of separate American National Guard units on the island of New Caledonia, hence the origin of the name.
- 24th Infantry Division
- 25th Infantry Division
- "Tropic Lightning" – Official (adopted August 3, 1953). In 1942 the division was ordered to deploy to Guadalcanal to relieve U.S. Marines there; only 31 days were required to accomplish the mission and earned the division its official designation. The Division patch is a taro leaf (indicating Hawaii, where the division was formed), and a lightning bolt, "representative of the manner in which the Division performs its allotted assignments."
- "Electric Strawberry" - so called because the shoulder patch taro leaf resembles a strawberry with a lightning bolt on it.
- 26th Infantry Division — "Yankee"; This is today's 26th Maneuver Enhancement Brigade.
- 27th Infantry Division — "Empire," a legacy of the 27th Armored Division.
- 28th Infantry Division
- 29th Infantry Division
- 30th Infantry Division — "Old Hickory"; This is today's 30th Heavy Brigade Combat Team.
- 31st Infantry Division — "Dixie";
- 32nd Infantry Division
- 33rd Infantry Division
- 34th Infantry Division
- 35th Infantry Division
- "Santa Fe" – The badge is a blue background with a white "Santa Fe cross", a device used to mark the old Santa Fe Trail, an area where the division trained
- 36th Infantry Division
- "Arrowhead" – Official depicting insignia.
- "Texas" – The division is based in Texas.
- "Lone Star" – Texas is the "Lone Star State".
- 37th Infantry Division
- 38th Infantry Division
- 40th Infantry Division
- 41st Infantry Division
- 42nd Infantry Division — "Rainbow"
- 43rd Infantry Division
- 45th Infantry Division — "Thunderbird" – official nickname; This is today's 45th Infantry Brigade Combat Team.
- 47th Infantry Division — "Viking" – a unit of the Minnesota Army National Guard.
- 63rd Infantry Division — "Blood and fire"; This is today's 63rd Regional Support Command.
- 65th Infantry Division — "Battle Axe";
- 66th Infantry Division — "Black Panther";
- 69th Infantry Division
- "Fightin' 69th" – official nickname; earned after breaking through the Siegfried Line in 1945.
- "Three B's" - nickname adopted during training. Humorous reference to the division's dislike of frequent bivouacking ordered by their original Commander, Charles L. Bolte.
- 70th Infantry Division — "Trailblazer";
- 71st Infantry Division — "Red Circle";
- 76th Infantry Division — "Onaway";
- 77th Infantry Division — "Metropolitan" or "Liberty"; This is today's 77th Sustainment Brigade.
- 78th Infantry Division — "Lightning";
- 79th Infantry Division — "Cross of Lorraine";
- 80th Infantry Division — "Blue Ridge"; This is today's 80th Training Command.
- 81st Infantry Division — "Wildcat"; This is today's 81st Regional Support Command.
- 83rd Infantry Division
- 84th Infantry Division — "Railsplitters"; This is today's 84th Training Command.
- 85th Infantry Division — "Custer"; This is today's 85th Support Command.
- 86th Infantry Division — "Blackhawk";
- 87th Infantry Division — "Golden Acorn"; This is today's 87th Support Command.
- 88th Infantry Division
- "Blue Devils";
- "The Puckering Butthole" – Due to the shape of the patch, a pair of crossed numeral 8's;
- "8 Across and 8 Up!" – A play on military slang, insinuating that the quality of the division is low; This is today's 88th Regional Support Command.
- 89th Infantry Division
- "Rolling 'W'"
- "Middle West";
- 90th Infantry Division — "Tough 'Ombres" – Due to the members of the division being from the Texas-Oklahoma area, close to Mexico.
- 91st Infantry Division — "Powder River";
- 92nd Infantry Division
- 93rd Infantry Division
- "Red Hand"; "Adrians"; "Blue Helmets"
- 94th Infantry Division
- 95th Infantry Division
- 96th Infantry Division — "Deadeye";
- 97th Infantry Division — "Trident";
- 98th Infantry Division — "Iroquois";
- 99th Infantry Division — "Checkerboard"; This is today's 99th Regional Support Command.
- 100th Infantry Division — "Century";
- 102nd Infantry Division — "Ozark";
- 103rd Infantry Division — "Cactus";
- 104th Infantry Division — "Timberwolf";
- 106th Infantry Division — "Golden Lion"