| Bas | |
|---|---|
| Ruler of Bithynia | |
| Reign | c. 376-326 BC |
| Predecessor | Boteiras |
| Successor | Zipoetes I |
| Born | c. 397 BC |
| Died | c. 326 BC (age 71) |
| Issue | Zipoetes I |
| Father | Boteiras |
Bas (Greek: Βᾶς; c. 397 BC – 326) was the first independent ruler of Bithynia. He ruled for fifty years, from 376 to 326 BC, and died at the age of 71.