diff --git a/django/db/backends/postgresql/client.py b/django/db/backends/postgresql/client.py
index 4c9bd63546..3b5ddafaca 100644
--- a/django/db/backends/postgresql/client.py
+++ b/django/db/backends/postgresql/client.py
@@ -32,9 +32,9 @@ class DatabaseClient(BaseDatabaseClient):
             args += ["-h", host]
         if port:
             args += ["-p", str(port)]
+        args.extend(parameters)
         if dbname:
             args += [dbname]
-        args.extend(parameters)
 
         env = {}
         if passwd:
diff --git a/tests/dbshell/test_postgresql.py b/tests/dbshell/test_postgresql.py
index 02924d0bcc..53dedaca01 100644
--- a/tests/dbshell/test_postgresql.py
+++ b/tests/dbshell/test_postgresql.py
@@ -154,7 +154,7 @@ class PostgreSqlDbshellCommandTestCase(SimpleTestCase):
     def test_parameters(self):
         self.assertEqual(
             self.settings_to_cmd_args_env({"NAME": "dbname"}, ["--help"]),
-            (["psql", "dbname", "--help"], None),
+            (["psql", "--help", "dbname"], None),
         )
 
     @skipUnless(connection.vendor == "postgresql", "Requires a PostgreSQL connection")