The Thirty-Fifth AAAI Conference on Artificial Intelligence (AAAI-21) will be held February 2-9, 2021 at the Vancouver Convention Centre, Vancouver, Canada. The general chair will be Qiang Yang (Hong Kong University of Science and Technology, Hong Kong) and the program chairs will be Kevin Leyton-Brown (University of British Columbia, Canada) and Mausam (Indian Institute of Technology Delhi, India). The purpose of the AAAI conference is to promote research in artificial intelligence (AI) and scientific exchange among AI researchers, practitioners, scientists, and engineers in affiliated disciplines. AAAI-20 will have a diverse technical track, student abstracts, poster sessions, invited speakers, tutorials, workshops, and exhibit and competition programs, all selected according to the highest reviewing standards. AAAI-21 welcomes submissions on mainstream AI topics as well as novel crosscutting work in related areas.