About 120 million girls around the world - slightly more than one in 10 - have been raped or sexually assaulted by the age of 20, a UN report says.
The children's agency Unicef also says 95,000 children and teenagers - most of them in Latin America and the Caribbean - were murdered in 2012 alone.
It notes that children around the globe are routinely exposed to violence, including bullying.
The document draws on data from 190 countries.
Grim audit
The violence "cuts across boundaries of age, geography, religion, ethnicity and income brackets,'' Unicef executive director Anthony Lake said.
"It occurs in places where children should be safe, their homes, schools and communities.
"Increasingly, it happens over the internet, and it's perpetrated by family members and teachers, neighbours and strangers and other children.''
The study revealed that about six out of 10 children aged between two and 14 were subjected to physical punishment from their carers on a regular basis.
It noted that while there had been growing recognition in recent years about the impact of violence against children, it largely remained underreported and undocumented.
The report stressed that violence against children in some countries remained socially accepted or tacitly condoned, and quite often victims were too afraid to report the abuse.
Never before have so many statistics been gathered from so many different countries, and together they have produced a grim global audit of violence against children, the BBC's Nick Bryant at the UN says.
Was having conversation on this topic just yesterday, on how many east European countries are not encouraged to keep children with special needs, but are encouraged by society to put them in asylums. Where they are kept in inhumane conditions.
These are not care homes, but are mental asylums. I'm not discriminatation against any type of specific nation, as abuse towards children happens accross the world including UK.
Manu cases do not make it to court due to lack of evidence. Sadly the evidence taken from a child with special needs is treated different to evidence of a normal child.
However, abuse happens in all cultures, religions and countries. Just yesterday I was reading an article about young boys as young as 4yrs old being abused by taxi drivers etc in Pakistan, the men openly gave interviews on why and how and why they exploited children.
Their is no excuse. Allah's wrath be on those who exploit and oppress the innocent. Aameen
This cannot be undone and I am sure it will be greatly appreciated.
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