This book constitutes the refereed proceedings of the 8th International Workshop on Rewriting Logic and its Applications, WRLA 2010, held as a satellite event of ETAPS 2010, Paphos, Cyprus, in March 2010.The 13 revised full papers presented were carefully reviewed and selected from 29 submissions. The papers are organized in topical sections on termination and narrowing; tools; the K framework; applications and semantics; maude model checking and debugging; and rewrite engines.