SOH or soh may refer to:
- Hispaniolan Ornithological Society or Sociedad Ornitológica de la Hispaniola
- Start of Header (or Start of Heading: ^A), an ISO C0 control code
- Sine = Opposite ÷ Hypotenuse, a mnemonic used to teach trigonometry
- Sydney Opera House
- State Of Health of batteries
- Soh (surname), a Cantonese romanization of the Chinese surname Su