diff --git a/django/db/backends/oracle/features.py b/django/db/backends/oracle/features.py
index dd356181e331..50fa2ce7e955 100644
--- a/django/db/backends/oracle/features.py
+++ b/django/db/backends/oracle/features.py
@@ -76,7 +76,6 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     requires_compound_order_by_subquery = True
     allows_multiple_constraints_on_same_fields = False
     supports_json_field_contains = False
-    supports_json_negative_indexing = False
     supports_collation_on_textfield = False
     supports_on_delete_db_default = False
     supports_no_precision_decimalfield = True
@@ -91,6 +90,10 @@ class DatabaseFeatures(BaseDatabaseFeatures):
         "INSERT INTO {} VALUES (DEFAULT, DEFAULT, DEFAULT)"
     )
 
+    @cached_property
+    def supports_json_negative_indexing(self):
+        return self.connection.oracle_version >= (21,)
+
     @cached_property
     def django_test_skips(self):
         skips = {
diff --git a/django/db/backends/oracle/operations.py b/django/db/backends/oracle/operations.py
index 1da4fe6127b5..b3e28b102ffc 100644
--- a/django/db/backends/oracle/operations.py
+++ b/django/db/backends/oracle/operations.py
@@ -729,3 +729,8 @@ def conditional_expression_supported_in_where_clause(self, expression):
         if isinstance(expression, RawSQL) and expression.conditional:
             return True
         return False
+
+    def format_json_path_numeric_index(self, num):
+        if num < 0:
+            return "[last-%s]" % abs(num + 1)  # Indexing is zero-based.
+        return super().format_json_path_numeric_index(num)
diff --git a/docs/releases/6.1.txt b/docs/releases/6.1.txt
index 41b554bb5d24..ed1855cac941 100644
--- a/docs/releases/6.1.txt
+++ b/docs/releases/6.1.txt
@@ -254,6 +254,10 @@ Models
   <django.db.models.DecimalField.decimal_places>` are no longer required to be
   set on Oracle, PostgreSQL, and SQLite.
 
+* :class:`~django.db.models.JSONField` now supports
+  :ref:`negative array indexing <key-index-and-path-transforms>` on Oracle
+  21c+.
+
 Pagination
 ~~~~~~~~~~
 
diff --git a/docs/topics/db/queries.txt b/docs/topics/db/queries.txt
index 0a63ffb55354..4070ab9066bd 100644
--- a/docs/topics/db/queries.txt
+++ b/docs/topics/db/queries.txt
@@ -1184,7 +1184,7 @@ directly, but you can still use dictionary unpacking to use it in a query:
     >>> Dog.objects.filter(**{"data__owner__other_pets__-1__name": "Fishy"})
     <QuerySet [<Dog: Rufus>]>
 
-.. admonition:: MySQL, MariaDB, and Oracle
+.. admonition:: MySQL, MariaDB, and Oracle < 21c
 
     Negative JSON array indices are not supported.
 
@@ -1192,6 +1192,10 @@ directly, but you can still use dictionary unpacking to use it in a query:
 
     SQLite support for negative JSON array indices was added.
 
+.. versionchanged:: 6.1
+
+    Oracle 21c+ support for negative JSON array indices was added.
+
 If the key you wish to query by clashes with the name of another lookup, use
 the :lookup:`contains <jsonfield.contains>` lookup instead.