By using the League of Nations and United Nations as case studies, this article identifies the women working at the diplomatic level in the Irish Department of External Affairs (D.E.A.) in the period 1923–76. Drawing on gender analysis, the article assesses where men and women were positioned in Irish diplomacy and asks if the role of women in the D.E.A. was shaped by a gendered viewpoint. It argues that there were more opportunities for women within the United Nations than the League of Nations and it questions if these increased diplomatic opportunities were reflective of women's changing status within the D.E.A. in the period under investigation. Overall, the article offers a new perspective on the conduct of Irish foreign policy between 1923 and 1976.