There were nearly 200 family violence deaths between 2009 and 2015, and intimate partner violence contributed to almost half of those.
Out of the 194 deaths, 83 involved a known history of abuse, and 43 of the women who died as a result of intimate partner violence had been in contact with police at least once.
The shocking statistics were released by the Family Violence Death Review Committee, which said the recent focus and momentum to reduce the unacceptable number of people dying as a result of family violence must continue.
"Preventing and addressing family violence has to stop being the role of a few and start being the responsibility of many," said committee chair Dr Jacqueline Short.
"These deaths are preventable. Every day, individuals and agencies work with people experiencing or perpetrating violence and there are multiple ways to intervene before a death occurs.
"There are opportunities to support child and adult victims, their families and whānau. We should also be working with violent men and their communities in ways that respectfully challenges them to take responsibility for their behaviour and be the parent their family and whānau needs."
The data report supplements the committee's Fifth Report, released last year. That report said there was a need to stop asking victims to keep themselves safe from abusive partners. Instead, workers need to proactively protect victims.
It said workers should also provide long-term assistance to victims rather than one-off safety advice, and there must be more focus on the person using violence, in addition to the victim.
It said violence must be recognised as being not just physical - it is also carried out through control, coercion and intimidation. These behaviours trap victims.
The committee said the Family and Whānau Violence Legislation Bill "represents the biggest change to family violence laws in two decades".