diff --git a/libcxx/include/__ranges/all.h b/libcxx/include/__ranges/all.h
--- a/libcxx/include/__ranges/all.h
+++ b/libcxx/include/__ranges/all.h
@@ -32,6 +32,7 @@
 
 #if !defined(_LIBCPP_HAS_NO_RANGES)
 
+namespace ranges {
 namespace views {
 
 namespace __all {
@@ -76,6 +77,7 @@
 using all_t = decltype(views::all(declval<_Range>()));
 
 } // namespace views
+} // namespace ranges
 
 #endif // !defined(_LIBCPP_HAS_NO_RANGES)
 
diff --git a/libcxx/include/__ranges/counted.h b/libcxx/include/__ranges/counted.h
--- a/libcxx/include/__ranges/counted.h
+++ b/libcxx/include/__ranges/counted.h
@@ -36,6 +36,7 @@
 
 #if !defined(_LIBCPP_HAS_NO_RANGES)
 
+namespace ranges {
 namespace views {
 
 namespace __counted {
@@ -89,6 +90,7 @@
 } // namespace __cpo
 
 } // namespace views
+} // namespace ranges
 
 #endif // !defined(_LIBCPP_HAS_NO_RANGES)
 
diff --git a/libcxx/include/__ranges/iota_view.h b/libcxx/include/__ranges/iota_view.h
--- a/libcxx/include/__ranges/iota_view.h
+++ b/libcxx/include/__ranges/iota_view.h
@@ -366,7 +366,6 @@
 
   template<class _Start, class _Bound>
   inline constexpr bool enable_borrowed_range<iota_view<_Start, _Bound>> = true;
-} // namespace ranges
 
 namespace views {
 namespace __iota {
@@ -395,6 +394,7 @@
   inline constexpr auto iota = __iota::__fn{};
 }
 } // namespace views
+} // namespace ranges
 
 #endif // !defined(_LIBCPP_HAS_NO_RANGES)
 
diff --git a/libcxx/include/ranges b/libcxx/include/ranges
--- a/libcxx/include/ranges
+++ b/libcxx/include/ranges
@@ -238,6 +238,8 @@
 
 #if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_RANGES)
 
+namespace views = ranges::views;
+
 #endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_RANGES)
 
 _LIBCPP_END_NAMESPACE_STD
diff --git a/libcxx/test/std/ranges/range.adaptors/range.all/all.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.all/all.pass.cpp
--- a/libcxx/test/std/ranges/range.adaptors/range.all/all.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.all/all.pass.cpp
@@ -85,9 +85,9 @@
 
 constexpr bool test() {
   {
-    ASSERT_SAME_TYPE(decltype(std::views::all(View<true>())), View<true>);
-    static_assert(noexcept(std::views::all(View<true>())));
-    static_assert(!noexcept(std::views::all(View<false>())));
+    ASSERT_SAME_TYPE(decltype(std::ranges::views::all(View<true>())), View<true>);
+    static_assert(noexcept(std::ranges::views::all(View<true>())));
+    static_assert(!noexcept(std::ranges::views::all(View<false>())));
 
     auto viewCopy = std::views::all(View<true>(2));
     ASSERT_SAME_TYPE(decltype(viewCopy), View<true>);
@@ -96,9 +96,9 @@
   }
 
   {
-    ASSERT_SAME_TYPE(decltype(std::views::all(std::declval<const CopyableView<true>&>())), CopyableView<true>);
-    static_assert(noexcept(std::views::all(CopyableView<true>())));
-    static_assert(!noexcept(std::views::all(CopyableView<false>())));
+    ASSERT_SAME_TYPE(decltype(std::ranges::views::all(std::declval<const CopyableView<true>&>())), CopyableView<true>);
+    static_assert(noexcept(std::ranges::views::all(CopyableView<true>())));
+    static_assert(!noexcept(std::ranges::views::all(CopyableView<false>())));
 
     CopyableView<true> view(2);
     auto viewCopy = std::views::all(view);
diff --git a/libcxx/test/std/ranges/range.adaptors/range.counted/counted.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.counted/counted.pass.cpp
--- a/libcxx/test/std/ranges/range.adaptors/range.counted/counted.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.counted/counted.pass.cpp
@@ -48,7 +48,7 @@
   {
     {
       contiguous_iterator<int*> iter(buffer);
-      std::span<int> s = std::views::counted(iter, 8);
+      std::span<int> s = std::ranges::views::counted(iter, 8);
       assert(s.size() == 8);
       assert(s.data() == buffer);
 
@@ -56,7 +56,7 @@
     }
     {
       const contiguous_iterator<int*> iter(buffer);
-      std::span<int> s = std::views::counted(iter, 8);
+      std::span<int> s = std::ranges::views::counted(iter, 8);
       assert(s.size() == 8);
       assert(s.data() == buffer);
 
@@ -64,7 +64,7 @@
     }
     {
       contiguous_iterator<const int*> iter(buffer);
-      std::span<const int> s = std::views::counted(iter, 8);
+      std::span<const int> s = std::ranges::views::counted(iter, 8);
       assert(s.size() == 8);
       assert(s.data() == buffer);
 
@@ -72,7 +72,7 @@
     }
     {
       const contiguous_iterator<const int*> iter(buffer);
-      std::span<const int> s = std::views::counted(iter, 8);
+      std::span<const int> s = std::ranges::views::counted(iter, 8);
       assert(s.size() == 8);
       assert(s.data() == buffer);
 
diff --git a/libcxx/test/std/ranges/range.factories/range.iota.view/views_iota.pass.cpp b/libcxx/test/std/ranges/range.factories/range.iota.view/views_iota.pass.cpp
--- a/libcxx/test/std/ranges/range.factories/range.iota.view/views_iota.pass.cpp
+++ b/libcxx/test/std/ranges/range.factories/range.iota.view/views_iota.pass.cpp
@@ -24,15 +24,15 @@
   // Test that this generally does the right thing.
   // Test with only one argument.
   {
-    assert(*std::views::iota(T(0)).begin() == T(0));
+    assert(*std::ranges::views::iota(T(0)).begin() == T(0));
   }
   {
-    const auto io = std::views::iota(T(10));
+    const auto io = std::ranges::views::iota(T(10));
     assert(*io.begin() == T(10));
   }
   // Test with two arguments.
   {
-    assert(*std::views::iota(T(0), u).begin() == T(0));
+    assert(*std::ranges::views::iota(T(0), u).begin() == T(0));
   }
   {
     const auto io = std::views::iota(T(10), u);