diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index 1a728bd787060..398d60ebc1aa1 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -128,6 +128,7 @@ set(ARROW_DOC_DIR "share/doc/${PROJECT_NAME}")
 set(BUILD_SUPPORT_DIR "${CMAKE_SOURCE_DIR}/build-support")
 
 set(ARROW_LLVM_VERSIONS
+    "15.0"
     "14.0"
     "13.0"
     "12.0"