Baasha (Hebrew: בַּעְשָׁא Baʿshāʾ) may refer to:
- Baasha of Israel, third king of the northern Israelite Kingdom of Israel
- Baasha of Ammon, king of Ammon in the 850s B.C.
Baasha may also refer to:
- Madras Baasha, diaclect of Tamil spoken in Chennai, India
- Telangana Baasha, dialect of Telugu spoken in Telangana, India
- Baashha or Baasha (Badshah), 1995 Indian Tamil film