This five-volume set LNAI 17105-17109 constitutes the refereed proceedings of the 36th Brazilian Conference on Intelligent Systems, BRACIS 2026, held in Cuiaba, Brazil, during October 19 - 22, 2026.The 228 full papers included in these volumes were carefully reviewed and selected from 582 submissions. They were organized in three tracks: 135 articles in the main track,showcasing cutting-edge AI/CI methods and solid results; 28 articles in the AI/CI for Social Good...