| 6 | Batgirl (5th Series) | 1st appearance of Penguin’s son; Ethan Cobblepot |
| 6/NS | Batgirl (5th Series) | 1st appearance of Penguin’s son; Ethan Cobblepot |
| 155 | Batman | 1st Appearance of Penguin (in Silver Age); 1st Silver Age appearance of Penguin |
| 58 | Detective Comics | 1st Appearance of Penguin |
| 58/A | Detective Comics | 1st Appearance of Penguin |