JST may refer to:
- Beijing Jishuitan Hospital (JST Hospital)
- Japan Science and Technology Agency
- Japan Solderless Terminal
- Japan Standard Time
- Jesuit School of Theology of Santa Clara University
- John Murtha Johnstown-Cambria County Airport (IATA airport code JST)
- Joseph Smith Translation of the Bible
- Jubilee Sailing Trust
- Weston Jesuit School of Theology