The Rexx Language Association is an independent, non-profit organization dedicated to promoting the use and understanding of the Rexx programming language. RexxLA manages several open source implementations of the Rexx language.The 2023 yearly RexxLA symposium was held May 14-17, in Almere, The Netherlands. This Proceedings publication contains interesting and informative presentations on the Rexx Programming language, in all its variants.The 2024 Symposium is planned for May 2024, in Brisbane, Australia.The RexxLA website can be found at https://www.rexxla.org