Attalus II Philadelphus
| Attalus II "Brother-Loving" | |
|---|---|
| Statue of Attalus II | |
| King of Pergamon | |
| Reign | 159-138 BC | 
| Predecessor | Eumenes II | 
| Successor | Attalus III | 
| Born | 220 BC | 
| Died | 138 BC (Aged 81-82) Pergamon | 
| Spouse | Stratonice | 
| Greek | Άτταλος Β΄ Φιλάδελφος | 
| Dynasty | Attalid dynasty | 
| Father | Attalus I | 
| Mother | Apollonis | 
| Religion | Greek Polytheism | 
Attalus II Philadelphus (Greek: Ἄτταλος ὁ Φιλάδελφος, Attalos II Philadelphos, which means "Attalus the brother-loving"; 220–138 BC) was a ruler of the Attalid kingdom of Pergamon and the founder of the city of Attalia.