  This volume contains the proceedings of PLACES 2024, the 15th edition of the
Workshop on Programming Language Approaches to Concurrency and
Communication-cEntric Software. The PLACES workshop series offers a forum for
researchers from different fields to exchange new ideas about the challenges of
modern and future programming, where concurrency and distribution are the norm
rather than a marginal concern.
  PLACES 2024 was held on 6 April 2024 in Luxembourg City, Luxembourg. The
programme included keynote talks by Mariangiola Dezani-Ciancaglini and Peter
M\"uller, presentations of five research papers, and three talks about
preliminary or already-published work that could foster interesting discussion
during the workshop.
  These proceedings contain the five accepted research papers, the abstracts of
the keynote talks, and a list of the other contributions.
