| Abbreviation | Definition |
|---|---|
| ITI | International Theological Institute |
| ITMH | I Think Myself Happy |
| ITOG | Internet Tutors Of God |
| ITVA | International Thorstein Veblen Association |
| IVE | Institute of the Divine Incarnation |
| IW | Infinite Wisdom |
| IWM | Intercessions Word Ministry |
| IWUMC | Ishpeming Wesley United Methodist Church |
| I-YEL | Inspiring Young Emerging Leaders |
| IYH | Im Yirtzeh Hashem (Hebrew: If it be G-d's will) |
| J | Jewish |
| J | Joy |
| J4J | Jews For Judaism |
| JAAA | Jamaican American Adventist Association |
| JAAJ | Judaïsme ancien / Ancient Judaism |
| JAAJ | Judaïsme ancien Ancient Judaism |
| JAAR | Journal of the American Academy of Religion |
| JABC | Jefferson Avenue Baptist Church |
| JAC | Jewish Activities Center |
| JAC | Just Another Christian |