| Acronym | Definition |
|---|
| YSA➣Youth Service America |
| YSA➣Young Single Adult |
| YSA➣Young Socialist Alliance (youth group) |
| YSA➣Yleinen Suomalainen Asiasanasto (Finnish General Thesaurus) |
| YSA➣Young Scientists of Australia |
| YSA➣Youth Studies Australia (Peer-Reviewed Academic Journal, University of Tasmania) |
| YSA➣Youth Savings Account |
| YSA➣Youth South Africa (forum) |
| YSA➣Your Secret Admirer |
| YSA➣Youth Stake Activities (Roosevelt, UT) |