The organisation is run by volunteers to help eliminate violence and sexual abuse against women and girls.
RNZ reports twenty groups from around the world have been recognised this year.
Samoa Victim Support Group President Siliniu Lina Change said it was the first time a Pacific country had won the award.
"Despite the frustration, the struggles that Victim Support has been facing, the accusations that have been hurled to Victim Support, we're still here and we want all the people that have confidence and been working together and supporting us, this if or them."
The award includes $US50,000 prize money.