A Youth Justice Board report has disclosed that British youngsters aged 10 to 17 carried out 277,986 offences in the past year.
According to The Telegraph, there was a 20 per cent rise in the number of children convicted for violent offences over the past three years.
The research showed that 53,930 10- to 17-year-olds were convicted of violence against the person last year, compared with 44,998 in 2004/5.
There were also increases in public order offences, theft and handling, and criminal damage crimes among young people.
The report identified a surge in the number of "ladette" offenders, as crimes committed by young women increased by 10 per cent to 57,962.
Conversely, the number of crimes committed by boys fell six per cent to 234,175 over the same three year period.
Figures also showed that women accounted for 21 per cent of all offences committed - compared to 18 per cent three years ago.
Despite the increases in violent crime and robbery, the use of custody as a punishment fell from 6,862 cases four years ago to 6,853 last year.
A separate Mori poll from the Youth Justice Board also showed that one in six young people has been involved in a "happy slapping" attack.
The 11 to 16-year-olds said they had either recorded or photographed an assault.
Among pupils questioned, 22 per cent said they had used their mobile phone to send a voicemail or text designed to scare, harass or threaten someone.
Among girls the proportion was 26 per cent. It was the first time youngsters had been asked about mobile phone-related crimes.
The Conservatives blamed the marked rise of violence among girls on binge drinking.
The news came as a new study claimed that cartoon favourites such as Scooby Doo and Pokemon could increase aggression among children because they feature high levels of violence.