| Abbreviation | Definition |
|---|---|
| HBY | Hot Blood Youth |
| HCY | Healthy Children and Youth |
| HCYS | Hey Can You Stop |
| HDYT | Hamilton District Youth Theatre |
| HDYT | Havant Dynamo Youth Theatre |
| HEALTHY | Healthy Eating Active Lifestyles Together Helping Youth |
| HEALTHY | Healthy Eating and Active Lifestyles Together Helping Youth |
| HEY | A Helping Encourage Youth |
| HEY | Healthcare Exploration for Youth |
| HEY | Healthy Empowered Youth |
| HEY | Honoring Emancipated Youth |
| HEYO | Health Education Youth Outreach |
| HFY | Home For Youth |
| HFY | Hope For Youth |
| HFYG | Holy Family Youth Group |
| HFYS | Homeless and Foster Youth Services |
| HHYB | Hickory Hills Youth Baseball |
| HIYA | Hemel Initiative for Youth Action |
| HIYF | Harrogate International Youth Festival |
| HKMY | Hong Kong Marshalled Youth |