Seven women have died in violent circumstances so far this year, according to Women's Aid.
The charity is calling for formal reviews of domestic killings as a matter of urgency.
Women's Aid held a seminar in Dublin today ahead of the UN International Day for the Elimination of Violence against Women.
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Since 1996, 225 women have died violently in Ireland - with 16 children being killed alongside their mothers.
The vast majority of women knew their killers and more than half were, or had been, in a relationship with them.
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Women's Aid wants these domestic killings to be formally reviewed, and said this could help save lives.
The charity said that without having the whole picture of these killings, authorities cannot see the full pattern of male violence against women and children.
It said Ireland is failing to put in place the best prevention strategies for high-risk victims of domestic violence, leaving them vulnerable to escalating abuse, or in extreme cases, to homicide.
