Question to the Home Office:

To ask the Secretary of State for the Home Department, how many people under the age of 16 in each county were victims of sexual offences in the last year for which figures are available.

The police recorded crime data that the Home Office receives from the police forces of England and Wales relate only to how many crimes are recorded and not
how many reports are received or how many people were victims. It is only possible to centrally provide figures for certain sexual offences that identify the age of the victim in statute, namely:

 Rape of a female child under 16
 Rape of a female child under 13
 Rape of a male child under 16
 Rape of a male child under 13
 Sexual assault on a female child under 13
 Sexual assault on a male child under 13
 Sexual activity involving a child under 13
 Sexual activity involving child under 16
 Sexual grooming (the victim must be under 16)

Data for these offences by police force area are available in the police recorded crime open data available here
https://www.gov.uk/government/statistics/police-recorded-crime-open-data-tables