Abstract: This article argues that Catholic Irish women who settled in Mexican Texas in the 1830s reshaped gender hierarchies through landownership and legal agency. Unlike their counterparts in Ireland and the United States, these women entered a Spanish-derived civil law system that recognized their right to own, manage, and defend property. Drawing on petitions, land grants, and case studies focusing on female immigrants like Elizabeth Hart and Anne Burke, the article shows how legal pluralism and frontier necessity enabled Irish women to exercise economic and civic power. Their experiences challenge male-centered narratives and demonstrate how law, migration, and circumstance reshaped gendered authority in early Texas.