Tso may refer to:
- Tso language, a Savanna language of eastern Nigeria
- Tso or Ts'o, several Chinese surnames (e.g., Cao) in dialect or Wade–Giles romanization, which may refer to:
- Zuo Zongtang or General Tso (左宗棠)
- Paul Ts'o (1929–2009), Hong Kong-born biophysical chemist
- Theodore Ts'o (born 1968), an American software developer mainly known for his contributions to the Linux kernel