diff --git a/changelogs/fragments/65122-fix-encrypt_string-stdin-name-ouput-tty.yml b/changelogs/fragments/65122-fix-encrypt_string-stdin-name-ouput-tty.yml
new file mode 100644
index 00000000000..975f806236c
--- /dev/null
+++ b/changelogs/fragments/65122-fix-encrypt_string-stdin-name-ouput-tty.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - ansible-vault - Fix ``encrypt_string`` output in a tty when using ``--sdtin-name`` option (https://github.com/ansible/ansible/issues/65121)
diff --git a/lib/ansible/cli/vault.py b/lib/ansible/cli/vault.py
index 1b4b69db90a..6ea330ab4ef 100644
--- a/lib/ansible/cli/vault.py
+++ b/lib/ansible/cli/vault.py
@@ -318,6 +318,9 @@ class VaultCLI(CLI):
             if stdin_text == '':
                 raise AnsibleOptionsError('stdin was empty, not encrypting')
 
+            if sys.stdout.isatty() and not stdin_text.endswith("\n"):
+                display.display("\n")
+
             b_plaintext = to_bytes(stdin_text)
 
             # defaults to None