This volume contains the papers presented at the Eleventh International Conference on Automated Deduction (CADE-11) held in Saratoga Springs, NY, inJune 1992. A total of 136 papers were submitted for presentation by researchers from nearly 20 countries. Papers covered many topics including: resolution; term rewriting; natural deduction; theorem proving, in particular in algebra and geometry; parallel theoremprovers; unification theory; constraint solving; logic programing; verification; multivalued, temporal and nonclassical logics; non-monotonic reasoning; planning; proof theory; higher- order logics; and inductive theorem proving. Each submission was reviewed by at least three program committee members and 46 papers were selected for presentation and publication. This volume also contains short