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
Authorities named Salman Abedi as the suspected attacker who detonated a bomb at the Manchester Arena.
Chris Gard and Connie Yates want permission to take nine-month-old Charlie Gard to America for a therapy trial.
On the lawns of the palace, thousands of people stood silently in tribute to the 22 people killed in the blast and the 59 injured.