STD is a three letter acronym standing for sexually transmitted disease. STD may also refer to:
Music
- Saves the Day, an American punk rock/emo/indie music band
- Severe Tire Damage (band), a rock and roll "garage" band from Palo Alto, California
- Severe Tire Damage (album) (1998), an album by They Might Be Giants
Other uses
- Doctor of Sacred Theology, (Sacrae Theologiae Doctor)
- São Tomé and Príncipe dobra, the ISO 4217 code for the currency of São Tomé and Príncipe
- Standards or Standardization
- Standard deviation, a statistical measure
- Internet standard, a specification for an innovative internetworking technology or methodology
- State transition diagram, a graphical representation of a state transition for a finite state machine
- Subscriber trunk dialling, or subscriber toll dialling, the standard codes for telephone dialing in India, the United Kingdom and the Republic of Ireland
- The Scottish Football League Third Division
