Urgot used to be the only champion in the game classified as a Marksman/Tank. However, his champion classification has since been changed to Marksman/Fighter, a champion classification that he shares with Quinn.
During the time that Gnar was revealed on PBE, he was classified as a Marksman/Tank. However, Gnar was released as a Fighter/Marksman, a champion classification he shared with Jayce.
He also strongly resembles "The Spineless Ones" from the X-Men, the best-known of them being Mojo. They are a fat alien race of rotten appearance who can not move on their own without advanced technology.
In addition, he bears a resemblance to Yagrum Bagarn from The Elder Scrolls III: Morrowind, in that they are large-stomached creatures who move around on mechanical legs.
Urgot's auto-attack range of 425 is the shortest of all champions classified as ranged.
According to Babaganoosh, Urgot was unavailable for the Ionia versus Noxus Grudge Match due to being damaged and needing considerable time to be repaired. He received a major strength buff in the following patch release.
Urgot's dance is a reference to Kirby's Victory Dance. A side by side comparison can be seen here
Urgot's taunt "Fear? No... I am the mindkiller." is a reference to Frank Herbert'sDune in which the Bene Gesserit Litany Against Fear begins with "I must not fear; fear is the mindkiller ..."
Urgot's joke "You can't beat me, so join me. I need a good pair of legs." is a pun on the popular saying "If you can't beat them, join them" with Urgot referring to the literal merging of flesh and bone.
In his classic splashart, Urgot has tubes coming out of his body that lead to his skull, they are not visible in his ingame model though.
This may or may not be a reference to Beyond Good and Evil's Alpha Soldiers, as Battlecast Urgot and them are very similar.
In the Nautilus Art Spotlight, around 2:50, a tab saying Urgot Mech can be seen in the top left. This was likely the development name for Battlecast Urgot.
Garen's sword is visible in the background of his splash art. In addition, the banner of Demacia lies torn beneath one of his legs, as does the helmet worn by the champion shown in the images of some summoner spells.
When Urgot was still a Noxian field soldier, his commanding officer was Sion.
This may not be canon since Sion's lore update.
When Urgot became the High Executioner of Noxus, he was attached to Swain's military division.
Before Urgot could execute the captured Jarvan IV, the Dauntless Vanguard and their leader Garen interfered at the final moment. Urgot was cut in two by the zealous warrior as he scrambled to free the Demacian Prince.
Professor Stanwick Pididly, using research notes stolen from Viktor, reconstructed Urgot into a cyborg body of his own design. The experiment was a success largely due to Urgot's sheer thirst for vengeance.