Stas is a surname or a transliteration of surnames from other langugages, e.g, spelling of Staš, Staś, or Russian: Стась. It may be derived from a diminutive from the given name Stanislav. Notable people with this surname include:
- Andrei Stas
- Jacques Stas, Belgian former national basketball team player
- Jean Stas, Belgian analytical chemist
- Staš, surname of multiple persons