Although feminist scholarship has discussed intersectionality extensively, few studies have addressed its implementation in public policies. This article fills that gap with an empirical study of the obstacles and enabling factors in implementing intersectionality in the Madrid City Council. We focus on the multiple meanings, actors, and structures involved in translating policy planning into concrete measures. Through a content analysis of policy documents, interviews, focus groups, and participant observation, our qualitative study identifies five key factors that hinder the implementation of intersectionality-informed policies: the absence of a legal framework and precise guidelines; the multiple and contrasting interpretations of intersectionality; the lack of training; the compartmentalized work structure and culture; and the unavailability and misuse of data. These findings contribute to the scholarship on the implementation of intersectionality in public policies and provide empirical-based recommendations to overcome the identified obstacles.