There's been a significant rise over the last few years.
A report shows there are more than 1,200 sex offenders in Derbyshire- considerably higher than the national average.
The ministry of Justice figures show there's one sex offender for every 759 people aged 10 and over in the county
But the average for England and Wales is only one for every 878 people.
It shows a rise of 63% in the county since 2010.
An NSPCC spokesman said: “As the number of sex offenders being monitored grows it’s important to understand how these arrangements will continue to reduce the risk of reoffending.
“Just this week a Home Affairs Select Committee report warned of forces struggling to cope with the huge pressures placed on their resources.
“With more offenders breaching their orders, it’s vital police are given all the tools they need to both effectively monitor child sex offenders in the community and combat the increasing threat posed by complex online abuse.”