The "Draw Your Own Area" function has been launched on the two-year anniversary of the website - police.uk - which has received more than half a billion hits since it went live.
The website - used by more than one in ten adults in England and Wales - previously provided data from a standard one-mile radius from a given postcode. But the new developments allow visitors to plot the precise area for which they want information on crime, anti-social behaviour and outcomes
A statistical breakdown featuring pie charts and graphs to show the rise and fall of crime has been added, along with information on the local Police and Crime Commissioner.
More top news
Detectives appealing for witnesses to a fatal accident have a released a picture of the 29-year-old victim.
Australian paramedics are being recruited to fill vacancies at the London Ambulance Service.
Brent Council is offering to cut business rates for firms that pay the London Living Wage.