The Middleweight Championship was a side competition for robots in the middleweight class, weighing up to 54kg. There were a total of four Middleweight Championships, one in Series 2, one in each series of Extreme, and one in Series 7. Usually, the competition was just a melee between all the entrants, but in Extreme 2, the middleweights were split up into 2 heats, from each of which 2 robots would advance to the final.
There was also a Middleweight Championship planned for Series 3, but it was cancelled along with the other championships for different weight classes due to a behind-the-scenes accident in The Pits. However, there was an exhibition match featuring all the middleweight robots in attendance. Craig Charles introduced this battle as the first round of the Middleweight Championship, which he said would run throughout the series, but in reality it was the only middleweight battle that was contested.
- Main article: Robot Wars: The Second Wars/Middleweight Championship
Winner: Hard Cheese
Although the Middleweight Championship for Series 3 was cancelled, there was an exhibition battle between all the middleweight robots in attendance, which resulted in a joint victory for A-Kill and Tentoumushi. As the championship had not been contested, the Middleweight Champion's trophy was awarded to Series 2 champion, Hard Cheese.
Extreme Series 1Edit
- Main article: Robot Wars Extreme: Series 1/Middleweight Championship
Extreme Series 2Edit
- Main article: Robot Wars Extreme: Series 2/Middleweight Championship
- Steel Sandwich vs Broadsword vs Malc 1.5 vs Typhoon: Steel Sandwich & Typhoon qualified
- Typhoon Twins vs 259 vs Doom Too vs Mammoth: Typhoon Twins & 259 qualified
- Steel Sandwich vs Typhoon vs Typhoon Twins vs 259: Typhoon won
- Main article: Robot Wars: The Seventh Wars/Middleweight Championship