| Abbreviation | Definition |
|---|---|
| DSYS | Dulles South Youth Sports |
| DSYW | Director of Sports Youth Welfare |
| DUTY | Dialogue in Understanding Through Youth |
| DY | Digital Youth |
| DYA | Department of Youth Affairs |
| DYA | Dublin Youth Athletics |
| DYA | Durham Youth Alliance |
| DYAE | Diabetes Youth Advocates Europe |
| DYAP | District Youth Achievement Plan |
| DYB | Dallas Youth Baseball |
| DYB | Danbury Youth Baseball |
| DYB | Denton Youth Basketball |
| DYB | Diocesan Youth Board |
| DYB | Dixie Youth Baseball |
| DYB | Duxbury Youth Baseball |
| DYC | Danville Youth Council |
| DYC | Darien Youth Club |
| DYC | Decatur Youth Council |
| DYC | Department of Youth Corrections |
| DYC | Detroit Youth Choir |