HAY
| Acronym | Definition |
|---|---|
| HAY | Hayward (Amtrak station code; Hawyard, CA) |
| HAY | How Are You? |
| HAY | Helping America's Youth (at-risk youth support program) |
| HAY | Hockomock Area YMCA (Young Men's Christian Association; Worcester, MA) |
| HAY | Healthy Asian Youth (Asian American Community Services; Upper Arlington, OH) |
| HAY | Hounslow Action for Youth (UK) |
| HAY | Houston Alumni and Youth (Houston, TX) |