This two-volume proceedings, set CCIS 2337-2338, constitutes of the proceedings of 15th Indian Conference on Human-Computer Interaction Design and Research, IndiaHCI 2024, held in Mumbai, India, during November 7-9, 2024. The 30 full papers and 12 short papers included in this volume were carefully reviewed and selected from 235 submissions. These papers belong to various tracks which have been divided between the two volumes as follows: - Part I: Paper Track. Part II: Game Design Track, Student Research Consortium Track; Posters and demos Track; Artworks and installations Track.