diff --git a/cpp/src/hash/hash_allocator.cuh b/cpp/include/cudf/hashing/detail/hash_allocator.cuh
similarity index 100%
rename from cpp/src/hash/hash_allocator.cuh
rename to cpp/include/cudf/hashing/detail/hash_allocator.cuh
diff --git a/cpp/src/hash/helper_functions.cuh b/cpp/include/cudf/hashing/detail/helper_functions.cuh
similarity index 100%
rename from cpp/src/hash/helper_functions.cuh
rename to cpp/include/cudf/hashing/detail/helper_functions.cuh
diff --git a/cpp/src/hash/concurrent_unordered_map.cuh b/cpp/src/hash/concurrent_unordered_map.cuh
index 439b1c2d066..d773c2763df 100644
--- a/cpp/src/hash/concurrent_unordered_map.cuh
+++ b/cpp/src/hash/concurrent_unordered_map.cuh
@@ -16,12 +16,12 @@
 
 #pragma once
 
-#include <hash/hash_allocator.cuh>
-#include <hash/helper_functions.cuh>
 #include <hash/managed.cuh>
 
 #include <cudf/detail/nvtx/ranges.hpp>
 #include <cudf/hashing/detail/default_hash.cuh>
+#include <cudf/hashing/detail/hash_allocator.cuh>
+#include <cudf/hashing/detail/helper_functions.cuh>
 #include <cudf/utilities/default_stream.hpp>
 #include <cudf/utilities/error.hpp>
 
diff --git a/cpp/src/hash/unordered_multiset.cuh b/cpp/src/hash/unordered_multiset.cuh
index 87075a39ea3..183042fc0f4 100644
--- a/cpp/src/hash/unordered_multiset.cuh
+++ b/cpp/src/hash/unordered_multiset.cuh
@@ -16,11 +16,10 @@
 
 #pragma once
 
-#include <hash/helper_functions.cuh>
-
 #include <cudf/column/column_device_view.cuh>
 #include <cudf/detail/utilities/vector_factories.hpp>
 #include <cudf/hashing/detail/default_hash.cuh>
+#include <cudf/hashing/detail/helper_functions.cuh>
 #include <cudf/utilities/span.hpp>
 
 #include <rmm/cuda_stream_view.hpp>
diff --git a/cpp/src/io/json/json_tree.cu b/cpp/src/io/json/json_tree.cu
index 9231040eb70..da5b0eedfbd 100644
--- a/cpp/src/io/json/json_tree.cu
+++ b/cpp/src/io/json/json_tree.cu
@@ -15,8 +15,6 @@
  */
 
 #include "nested_json.hpp"
-#include <hash/hash_allocator.cuh>
-#include <hash/helper_functions.cuh>
 #include <io/utilities/hostdevice_vector.hpp>
 
 #include <cudf/detail/nvtx/ranges.hpp>
@@ -24,7 +22,9 @@
 #include <cudf/detail/utilities/algorithm.cuh>
 #include <cudf/detail/utilities/vector_factories.hpp>
 #include <cudf/hashing/detail/default_hash.cuh>
+#include <cudf/hashing/detail/hash_allocator.cuh>
 #include <cudf/hashing/detail/hashing.hpp>
+#include <cudf/hashing/detail/helper_functions.cuh>
 #include <cudf/utilities/error.hpp>
 #include <cudf/utilities/span.hpp>
 
diff --git a/cpp/src/join/join_common_utils.hpp b/cpp/src/join/join_common_utils.hpp
index 4c1b1ed98b1..e96505e5ed6 100644
--- a/cpp/src/join/join_common_utils.hpp
+++ b/cpp/src/join/join_common_utils.hpp
@@ -17,13 +17,12 @@
 
 #include <cudf/detail/join.hpp>
 #include <cudf/hashing/detail/default_hash.cuh>
+#include <cudf/hashing/detail/hash_allocator.cuh>
+#include <cudf/hashing/detail/helper_functions.cuh>
 #include <cudf/join.hpp>
 #include <cudf/table/row_operators.cuh>
 #include <cudf/table/table_view.hpp>
 
-#include <hash/hash_allocator.cuh>
-#include <hash/helper_functions.cuh>
-
 #include <rmm/mr/device/polymorphic_allocator.hpp>
 
 #include <cuco/static_map.cuh>
diff --git a/cpp/src/stream_compaction/stream_compaction_common.hpp b/cpp/src/stream_compaction/stream_compaction_common.hpp
index 58d958d2ff4..18c531e3e69 100644
--- a/cpp/src/stream_compaction/stream_compaction_common.hpp
+++ b/cpp/src/stream_compaction/stream_compaction_common.hpp
@@ -15,12 +15,11 @@
  */
 #pragma once
 
+#include <cudf/hashing/detail/hash_allocator.cuh>
+#include <cudf/hashing/detail/helper_functions.cuh>
 #include <cudf/table/row_operators.cuh>
 #include <cudf/table/table_device_view.cuh>
 
-#include <hash/hash_allocator.cuh>
-#include <hash/helper_functions.cuh>
-
 #include <rmm/mr/device/polymorphic_allocator.hpp>
 
 #include <cuco/static_map.cuh>
diff --git a/cpp/src/text/subword/bpe_tokenizer.cuh b/cpp/src/text/subword/bpe_tokenizer.cuh
index 83aa22aaae9..2fa879ea734 100644
--- a/cpp/src/text/subword/bpe_tokenizer.cuh
+++ b/cpp/src/text/subword/bpe_tokenizer.cuh
@@ -18,10 +18,9 @@
 
 #include <nvtext/bpe_tokenize.hpp>
 
-#include <hash/hash_allocator.cuh>
-
 #include <cudf/column/column.hpp>
 #include <cudf/column/column_device_view.cuh>
+#include <cudf/hashing/detail/hash_allocator.cuh>
 #include <cudf/hashing/detail/murmurhash3_x86_32.cuh>
 #include <cudf/strings/string_view.cuh>