diff --git a/aiida/cmdline/commands/cmd_process.py b/aiida/cmdline/commands/cmd_process.py
index 717f2b58b6..7c3da143ec 100644
--- a/aiida/cmdline/commands/cmd_process.py
+++ b/aiida/cmdline/commands/cmd_process.py
@@ -214,16 +214,23 @@ def process_status(call_link_label, max_depth, processes):
 
 @verdi_process.command('kill')
 @arguments.PROCESSES()
+@options.ALL(help='Kill all processes if no specific processes are specified.')
 @options.TIMEOUT()
 @options.WAIT()
 @decorators.with_dbenv()
-def process_kill(processes, timeout, wait):
+def process_kill(processes, all_entries, timeout, wait):
     """Kill running processes."""
     from aiida.engine.processes import control
 
+    if processes and all_entries:
+        raise click.BadOptionUsage('all', 'cannot specify individual processes and the `--all` flag at the same time.')
+
+    if all_entries:
+        click.confirm('Are you sure you want to kill all processes?', abort=True)
+
     try:
         message = 'Killed through `verdi process kill`'
-        control.kill_processes(processes, timeout=timeout, wait=wait, message=message)
+        control.kill_processes(processes, all_entries=all_entries, timeout=timeout, wait=wait, message=message)
     except control.ProcessTimeoutException as exception:
         echo.echo_critical(str(exception) + '\nFrom the CLI you can call `verdi devel revive <PID>`.')
 
diff --git a/tests/cmdline/commands/test_process.py b/tests/cmdline/commands/test_process.py
index dda404ff28..c0f8a79388 100644
--- a/tests/cmdline/commands/test_process.py
+++ b/tests/cmdline/commands/test_process.py
@@ -478,3 +478,14 @@ def test_process_kill(submit_and_await, run_cli_command):
     run_cli_command(cmd_process.process_kill, [str(node.pk), '--wait'])
     await_condition(lambda: node.is_killed)
     assert node.process_status == 'Killed through `verdi process kill`'
+
+
+@pytest.mark.requires_rmq
+@pytest.mark.usefixtures('started_daemon_client')
+def test_process_kill_all(submit_and_await, run_cli_command):
+    """Test the ``verdi process kill --all`` command."""
+    node = submit_and_await(WaitProcess, ProcessState.WAITING)
+
+    run_cli_command(cmd_process.process_kill, ['--all', '--wait'], user_input='y')
+    await_condition(lambda: node.is_killed)
+    assert node.process_status == 'Killed through `verdi process kill`'