YISS
| Acronym | Definition |
|---|---|
| YISS | Youth Internet Safety Survey |
| YISS | Yongsan International School of Seoul (South Korea) |
| YISS | Youth in the Spirit Seminar |
| YISS | Yeats International Summer School (Sligo, Republic of Ireland) |
| YISS | Youth Inclusion Support Service (youth crime prevention; UK) |
| YISS | Yours in Sea Scouting (Boy Scouts) |