Police made more than 370 arrests at Notting Hill Carnival over the Bank Holiday weekend.
Monday night was "marred" by the only stabbing of the event, with a male receiving non-life-threatening injuries at around 8.10pm in Ladbroke Grove.
Scotland Yard said 30 officers were injured "in the line of duty".
According to the Metropolitan Police Federation, two were spat at in the face and had to be taken to hospital, while in another incident three officers were bitten, one of whom was also taken to hospital.
Inspector Richard Berns, who is based in Camden, said on Twitter: "Five of my officers were violently attacked at #NottingHillCarnival. Three punched in the face. One bitten and headbutted, and another jumped on from behind.
"Three suspects arrested and one more will follow (ran off but we know who he is). Totally unacceptable!"
As of 10.15pm on Monday, the Metropolitan Police said they had made 240 arrests on the Bank Holiday Monday and 133 on Sunday, which included 10 made by the British Transport Police (BTP).
A further 12 arrests were made by BTP on Monday.
Officers detained 156 people on drugs offences, 69 on suspicion of possession of an offensive weapon and nine on suspicion of sexual offences.
Among the items seized were knives, a metal pole and a Taser.
Last year some 313 arrests were carried out.
Notting Hill Carnival Gold Commander Dave Musker said: "We would like to thank all those who took to the streets to celebrate everything that the carnival stands for, in a kind and considerate manner.
"However Monday night was marred by the news of a non-life-threatening stabbing at around 8.10pm in Ladbroke Grove. Thankfully this was the only incident of this nature throughout the whole weekend."