THE internet was used to commit nearly 300 sex crimes against children in Wales last year - including 116 offences in Dyfed-Powys.
The figure was the highest recorded by any of the four Welsh police forces.
Charity NSPCC Cymru/Wales, which obtained the figures using a Freedom of Information request, said offences reported to police in Wales included rape, sexual assault and grooming victims before meeting them.
Police were last year for the first time required to record - or ’cyber flag’- any sexual crime against a child that involved the use of the internet.
Of the 296 crimes recorded in Wales last year, 21 victims were aged 10 and under, with the youngest just six years old.
The charity said there was a wide variation across Wales in the number of offences that were "cyber-flagged". Dyfed-Powys Police recorded 116 offences, North Wales 95, Gwent 59 and South Wales 26.
With more young children using social media, NSPCC Cymru/Wales is urging police forces to ensure all officers understand how sex offenders abuse the internet to carry out crimes against children and how to investigate and record such crimes effectively.
Across 38 police forces in Wales and England there were more than 3,000 sex crimes against children involving the internet last year; an average of eight reported every day.
The charity has also called on the new Welsh Government to introduce a comprehensive online safety action plan, supported by a digital advisory group, to ensure Wales is at the forefront of keeping children safe online.
Empowering children to protect themselves by making online safety a key part of compulsory age-appropriate personal and social education is also a key NSPCC policy in Wales, along with adequate guidance for public service professionals on ‘sexting’ and the law.
Des Mannion, head of NSPCC Cymru/Wales, said: "These figures are a matter of huge concern and highlight just how prevalent online child abuse has now become.
"The sheer number of cases confirms our fears that the digital world is playing a significant role in the sexual abuse of children. It’s clear that a large volume of sexual assaults, and in some cases rapes, have involved use of the internet - for example by grooming victims before abusing them offline, or live-streaming the abuse.
"We know this type of grooming is on the rise because children are increasingly telling our ChildLine service how they are being targeted online. Predatory adults posing as children try to meet them or blackmail them into meeting up or performing sexual acts on webcams, which obviously terrifies them and can leave some feeling distressed and suicidal.
"It’s crucial that all police forces ensure officers understand how sex offenders abuse the internet. Online abuse can be just one click away and we need innovative solutions to help keep Welsh children safe."
NSPCC chief executive officer, Peter Wanless, said: "By revealing this first year of data we hope to highlight how police are under increasing pressure to cope with online offences so we have to ensure they have the resources and training to make them fit for tackling crime in the 21st century.
"Ensuring every child who has endured abuse has swift access to mental health support is also crucially important – as we continue to call for through our key It’s Time campaign."