This 2-volume set LNCS 15780-15781 constitutes the refereed proceedings of the 19th International Conference on Universal Access in Human-Computer Interaction, UAHCI 2025, held as part of the 27th International Conference, HCI International 2025, in Gothemburg, Sweden during June 22nd to 27th, 2025. The total of 1430 papers and 355 posters included in the HCII 2025 proceedings was carefully reviewed and selected from 7972 submissions. The two volumes cover topics as follows: Universal Access Theory and Practice Multimodality and UI Adaptation Universal Access and AI Inclusive Virtual and Augmented Reality Inclusive Learning and Playing