JTI may refer to:
- Japan Tobacco International
- Join the Impact, an American LGBT political movement
- Journal of Japanese Trade & Industry, now called Japan Spotlight
- Journal of Theological Interpretation
- Jubail Technical Institute, in Saudi Arabia
- Jungian Type Indicator, a psychometric questionnaire to assess personality types
- University of Virginia Japanese Text Initiative
- Veermata Jijabai Technological Institute, formerly Victoria Jubilee Technical Institute, Mumbai