Gender-based violence is one of the most pervasive human rights violations facing women in Pacific Island Countries (Oceania). Rates of intimate partner violence (IPV) and sexual assault across the region far exceed global averages, with lifetime prevalence of physical partner violence reported at 61% in Fiji, 59% in Kiribati, and 46% in the Solomon Islands. Women are subjected not only to physical abuse, but also to emotional violence, coercive control, and sexual assault by both partners and non-partners. In Vanuatu, for example, 68% of women report emotional violence, while in Nauru, 47% have experienced sexual violence outside of intimate partnerships. Cultural stigma, the preservation of family honor, and religious interpretations that reinforce patriarchal authority frequently discourage disclosure and help-seeking. This silence perpetuates cycles of abuse and contributes to women's heightened vulnerability to depression, anxiety, and post-traumatic stress. Colonial histories and missionary influences have further entrenched gender hierarchies and shaped norms that justify violence against women. In Samoa, customary governance structures and biblical interpretations have excluded women from decision-making, while also reinforcing the perception that domestic and sexual violence is a result of women's failure to meet prescribed roles. Such attitudes normalize abuse and obscure structural inequalities that place women at risk. The consequences of gender-based violence are profound, extending beyond immediate physical harm to affect women's educational attainment, economic participation, political representation, and overall well-being. Addressing these challenges requires not only culturally grounded mental health support and survivor-centered services but also systemic reforms that empower women in governance, increase access to justice, and challenge entrenched social norms. Without these interventions, gender-based violence will remain a significant barrier to achieving gender equality and sustainable development in Oceania.