Auckland has almost double the national average of reported sexual assault victimisations in New Zealand.
According to police figures released under the Official Information Act, there were 20.89 victimisations per 10,000 people in Auckland Central Area, compared with the national rate of 10.92 during 2015.
Eastern Bay of Plenty had the second-highest rate of victimisations with 19.41 and the Whanganui police area had the third-highest rate with 19.39.
Toah-nnest is a national network of providers of specialist services for sexual violence prevention and intervention.
Toah-nnest national tauiwi manager Claire Lyons said there had been an increase in people accessing sexual violence services throughout the country.