diff --git a/include/boost/unordered/concurrent_flat_map_fwd.hpp b/include/boost/unordered/concurrent_flat_map_fwd.hpp
index 99fa130c..e66f3674 100644
--- a/include/boost/unordered/concurrent_flat_map_fwd.hpp
+++ b/include/boost/unordered/concurrent_flat_map_fwd.hpp
@@ -1,6 +1,7 @@
 /* Fast open-addressing concurrent hashmap.
  *
  * Copyright 2023 Christian Mazakas.
+ * Copyright 2024 Braden Ganetsky.
  * Distributed under the Boost Software License, Version 1.0.
  * (See accompanying file LICENSE_1_0.txt or copy at
  * http://www.boost.org/LICENSE_1_0.txt)
@@ -11,11 +12,16 @@
 #ifndef BOOST_UNORDERED_CONCURRENT_FLAT_MAP_FWD_HPP
 #define BOOST_UNORDERED_CONCURRENT_FLAT_MAP_FWD_HPP
 
+#include <boost/config.hpp>
 #include <boost/container_hash/hash_fwd.hpp>
 
 #include <functional>
 #include <memory>
 
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+#include <memory_resource>
+#endif
+
 namespace boost {
   namespace unordered {
 
@@ -43,6 +49,15 @@ namespace boost {
     typename concurrent_flat_map<K, T, H, P, A>::size_type erase_if(
       concurrent_flat_map<K, T, H, P, A>& c, Predicate pred);
 
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+    namespace pmr {
+      template <class Key, class T, class Hash = boost::hash<Key>,
+        class Pred = std::equal_to<Key> >
+      using concurrent_flat_map = boost::unordered::concurrent_flat_map<Key, T,
+        Hash, Pred, std::pmr::polymorphic_allocator<std::pair<Key const, T> > >;
+    } // namespace pmr
+#endif
+
   } // namespace unordered
 
   using boost::unordered::concurrent_flat_map;
diff --git a/include/boost/unordered/concurrent_flat_set_fwd.hpp b/include/boost/unordered/concurrent_flat_set_fwd.hpp
index 03bcc5b4..1133d9c9 100644
--- a/include/boost/unordered/concurrent_flat_set_fwd.hpp
+++ b/include/boost/unordered/concurrent_flat_set_fwd.hpp
@@ -2,6 +2,7 @@
  *
  * Copyright 2023 Christian Mazakas.
  * Copyright 2023 Joaquin M Lopez Munoz.
+ * Copyright 2024 Braden Ganetsky.
  * Distributed under the Boost Software License, Version 1.0.
  * (See accompanying file LICENSE_1_0.txt or copy at
  * http://www.boost.org/LICENSE_1_0.txt)
@@ -12,11 +13,16 @@
 #ifndef BOOST_UNORDERED_CONCURRENT_FLAT_SET_FWD_HPP
 #define BOOST_UNORDERED_CONCURRENT_FLAT_SET_FWD_HPP
 
+#include <boost/config.hpp>
 #include <boost/container_hash/hash_fwd.hpp>
 
 #include <functional>
 #include <memory>
 
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+#include <memory_resource>
+#endif
+
 namespace boost {
   namespace unordered {
 
@@ -44,6 +50,15 @@ namespace boost {
     typename concurrent_flat_set<K, H, P, A>::size_type erase_if(
       concurrent_flat_set<K, H, P, A>& c, Predicate pred);
 
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+    namespace pmr {
+      template <class Key, class Hash = boost::hash<Key>,
+        class Pred = std::equal_to<Key> >
+      using concurrent_flat_set = boost::unordered::concurrent_flat_set<Key,
+        Hash, Pred, std::pmr::polymorphic_allocator<Key> >;
+    } // namespace pmr
+#endif
+
   } // namespace unordered
 
   using boost::unordered::concurrent_flat_set;
diff --git a/include/boost/unordered/unordered_flat_map_fwd.hpp b/include/boost/unordered/unordered_flat_map_fwd.hpp
index 5551d1a6..f758f83a 100644
--- a/include/boost/unordered/unordered_flat_map_fwd.hpp
+++ b/include/boost/unordered/unordered_flat_map_fwd.hpp
@@ -1,5 +1,6 @@
 
 // Copyright (C) 2022 Christian Mazakas
+// Copyright (C) 2024 Braden Ganetsky
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
@@ -15,6 +16,10 @@
 #include <functional>
 #include <memory>
 
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+#include <memory_resource>
+#endif
+
 namespace boost {
   namespace unordered {
     template <class Key, class T, class Hash = boost::hash<Key>,
@@ -36,6 +41,16 @@ namespace boost {
     void swap(unordered_flat_map<Key, T, Hash, KeyEqual, Allocator>& lhs,
       unordered_flat_map<Key, T, Hash, KeyEqual, Allocator>& rhs)
       noexcept(noexcept(lhs.swap(rhs)));
+
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+    namespace pmr {
+      template <class Key, class T, class Hash = boost::hash<Key>,
+        class KeyEqual = std::equal_to<Key> >
+      using unordered_flat_map =
+        boost::unordered::unordered_flat_map<Key, T, Hash, KeyEqual,
+          std::pmr::polymorphic_allocator<std::pair<const Key, T> > >;
+    } // namespace pmr
+#endif
   } // namespace unordered
 
   using boost::unordered::unordered_flat_map;
diff --git a/include/boost/unordered/unordered_flat_set_fwd.hpp b/include/boost/unordered/unordered_flat_set_fwd.hpp
index 02435bab..9214939f 100644
--- a/include/boost/unordered/unordered_flat_set_fwd.hpp
+++ b/include/boost/unordered/unordered_flat_set_fwd.hpp
@@ -1,5 +1,6 @@
 
 // Copyright (C) 2022 Christian Mazakas
+// Copyright (C) 2024 Braden Ganetsky
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
@@ -15,6 +16,10 @@
 #include <functional>
 #include <memory>
 
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+#include <memory_resource>
+#endif
+
 namespace boost {
   namespace unordered {
     template <class Key, class Hash = boost::hash<Key>,
@@ -36,6 +41,15 @@ namespace boost {
     void swap(unordered_flat_set<Key, Hash, KeyEqual, Allocator>& lhs,
       unordered_flat_set<Key, Hash, KeyEqual, Allocator>& rhs)
       noexcept(noexcept(lhs.swap(rhs)));
+
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+    namespace pmr {
+      template <class Key, class Hash = boost::hash<Key>,
+        class KeyEqual = std::equal_to<Key> >
+      using unordered_flat_set = boost::unordered::unordered_flat_set<Key, Hash,
+        KeyEqual, std::pmr::polymorphic_allocator<Key> >;
+    } // namespace pmr
+#endif
   } // namespace unordered
 
   using boost::unordered::unordered_flat_set;
diff --git a/include/boost/unordered/unordered_map_fwd.hpp b/include/boost/unordered/unordered_map_fwd.hpp
index b374965e..375889a1 100644
--- a/include/boost/unordered/unordered_map_fwd.hpp
+++ b/include/boost/unordered/unordered_map_fwd.hpp
@@ -1,6 +1,7 @@
 
 // Copyright (C) 2008-2011 Daniel James.
 // Copyright (C) 2022-2023 Christian Mazakas
+// Copyright (C) 2024 Braden Ganetsky
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
@@ -16,6 +17,10 @@
 #include <functional>
 #include <memory>
 
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+#include <memory_resource>
+#endif
+
 namespace boost {
   namespace unordered {
     template <class K, class T, class H = boost::hash<K>,
@@ -58,6 +63,20 @@ namespace boost {
 
     template <class N, class K, class T, class A> class node_handle_map;
     template <class Iter, class NodeType> struct insert_return_type_map;
+
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+    namespace pmr {
+      template <class K, class T, class H = boost::hash<K>,
+        class P = std::equal_to<K> >
+      using unordered_map = boost::unordered::unordered_map<K, T, H, P,
+        std::pmr::polymorphic_allocator<std::pair<const K, T> > >;
+
+      template <class K, class T, class H = boost::hash<K>,
+        class P = std::equal_to<K> >
+      using unordered_multimap = boost::unordered::unordered_multimap<K, T, H,
+        P, std::pmr::polymorphic_allocator<std::pair<const K, T> > >;
+    } // namespace pmr
+#endif
   } // namespace unordered
 
   using boost::unordered::unordered_map;
diff --git a/include/boost/unordered/unordered_node_map_fwd.hpp b/include/boost/unordered/unordered_node_map_fwd.hpp
index ec598168..95ac162d 100644
--- a/include/boost/unordered/unordered_node_map_fwd.hpp
+++ b/include/boost/unordered/unordered_node_map_fwd.hpp
@@ -1,5 +1,6 @@
 
 // Copyright (C) 2022 Christian Mazakas
+// Copyright (C) 2024 Braden Ganetsky
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
@@ -15,6 +16,10 @@
 #include <functional>
 #include <memory>
 
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+#include <memory_resource>
+#endif
+
 namespace boost {
   namespace unordered {
     template <class Key, class T, class Hash = boost::hash<Key>,
@@ -36,6 +41,16 @@ namespace boost {
     void swap(unordered_node_map<Key, T, Hash, KeyEqual, Allocator>& lhs,
       unordered_node_map<Key, T, Hash, KeyEqual, Allocator>& rhs)
       noexcept(noexcept(lhs.swap(rhs)));
+
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+    namespace pmr {
+      template <class Key, class T, class Hash = boost::hash<Key>,
+        class KeyEqual = std::equal_to<Key> >
+      using unordered_node_map =
+        boost::unordered::unordered_node_map<Key, T, Hash, KeyEqual,
+          std::pmr::polymorphic_allocator<std::pair<const Key, T> > >;
+    } // namespace pmr
+#endif
   } // namespace unordered
 
   using boost::unordered::unordered_node_map;
diff --git a/include/boost/unordered/unordered_node_set_fwd.hpp b/include/boost/unordered/unordered_node_set_fwd.hpp
index 977d032f..75215f2a 100644
--- a/include/boost/unordered/unordered_node_set_fwd.hpp
+++ b/include/boost/unordered/unordered_node_set_fwd.hpp
@@ -1,5 +1,6 @@
 
 // Copyright (C) 2023 Christian Mazakas
+// Copyright (C) 2024 Braden Ganetsky
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
@@ -15,6 +16,10 @@
 #include <functional>
 #include <memory>
 
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+#include <memory_resource>
+#endif
+
 namespace boost {
   namespace unordered {
     template <class Key, class Hash = boost::hash<Key>,
@@ -36,6 +41,15 @@ namespace boost {
     void swap(unordered_node_set<Key, Hash, KeyEqual, Allocator>& lhs,
       unordered_node_set<Key, Hash, KeyEqual, Allocator>& rhs)
       noexcept(noexcept(lhs.swap(rhs)));
+
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+    namespace pmr {
+      template <class Key, class Hash = boost::hash<Key>,
+        class KeyEqual = std::equal_to<Key> >
+      using unordered_node_set = boost::unordered::unordered_node_set<Key, Hash,
+        KeyEqual, std::pmr::polymorphic_allocator<Key> >;
+    } // namespace pmr
+#endif
   } // namespace unordered
 
   using boost::unordered::unordered_node_set;
diff --git a/include/boost/unordered/unordered_set_fwd.hpp b/include/boost/unordered/unordered_set_fwd.hpp
index b74c6136..aea95d88 100644
--- a/include/boost/unordered/unordered_set_fwd.hpp
+++ b/include/boost/unordered/unordered_set_fwd.hpp
@@ -1,6 +1,7 @@
 
 // Copyright (C) 2008-2011 Daniel James.
 // Copyright (C) 2022 Christian Mazakas
+// Copyright (C) 2024 Braden Ganetsky
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
@@ -16,6 +17,10 @@
 #include <functional>
 #include <memory>
 
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+#include <memory_resource>
+#endif
+
 namespace boost {
   namespace unordered {
     template <class T, class H = boost::hash<T>, class P = std::equal_to<T>,
@@ -56,6 +61,18 @@ namespace boost {
 
     template <class N, class T, class A> class node_handle_set;
     template <class Iter, class NodeType> struct insert_return_type_set;
+
+#ifndef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+    namespace pmr {
+      template <class T, class H = boost::hash<T>, class P = std::equal_to<T> >
+      using unordered_set = boost::unordered::unordered_set<T, H, P,
+        std::pmr::polymorphic_allocator<T> >;
+
+      template <class T, class H = boost::hash<T>, class P = std::equal_to<T> >
+      using unordered_multiset = boost::unordered::unordered_multiset<T, H, P,
+        std::pmr::polymorphic_allocator<T> >;
+    } // namespace pmr
+#endif
   } // namespace unordered
 
   using boost::unordered::unordered_multiset;