This book constitutes the thoroughly refereed post-workshop proceedings of the 11th International Workshop on Languages and Compilers for Parallel Computing, LCPC'98, held in Chapel Hill, North Carolina, USA in August 1998.The 24 revised full papers presented have gone through two rounds of selection and reviewing. The volume is divided in topical sections on Java, locality, network computing, Fortran, irregular applications, instructions scheduling, and dependence analysis.