While the role of women and the importance of gender mainstreaming in peace building is becoming increasingly accepted (most notably through the adoption of and momentum generated by UNSCR 1325, as well as corresponding national action plans created by countries across the globe), the role of women in violent extremism remains an understudied issue. Much of the evidence that demonstrates women’s potential to contribute to countering violent extremism is patchy and anecdotal. This Information2Action focuses on some key debates, challenges and opportunities relating to promoting women’s participation in countering violent extremism.