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 descriptions of 23 implementations of automated deduction systems. The volume opens with a keynote address by Larry Wos, winner of the first Herbrand Award for Distinguished Contributions to Automated Reasoning.