International Violence Against Women Act of 2015

Directs the Secretary of State to establish an Office of Global Women's Issues which shall be headed by an Ambassador-at-Large for Global Women's Issues.

Establishes in the U.S. Agency for International Development (USAID) a Senior Coordinator for Gender Equality and Women's Empowerment who shall direct USAID activities, policies, programs, and funding relating to gender equality and women's empowerment.

Directs the Ambassador-at-Large to: (1) develop or update annually for five years (after the 2012 United States Strategy to Prevent and Respond to Gender-Based Violence Globally which shall be deemed to be the first required strategy) a U.S. global strategy to prevent and respond to violence against women and girls, and (2) coordinate U.S. government efforts regarding gender integration and advancing the status of women and girls in U.S. foreign policy.

Directs the Ambassador-at-Large and Senior Coordinator to: (1) include in each strategy an analysis of best practices for preventing and addressing violence against women and girls internationally; and (2) develop a plan for monitoring programs, projects, and activities carried out under this Act.