This study identifies data gaps throughout the textile industry supply and value chains, from fibre to the end of product life stage and assesses current initiatives addressing them. It also exposes the following challenges: missing data, data accessibility, data management, reliability and relevance, mandatory or non-mandatory data collection, data sharing, and data cost issues. Drawing on a literature review, 17 stakeholder interviews and 2 expert workshops, the study gathers essential insights from the field, and evaluates current and forthcoming initiatives for addressing data gaps.