PGSU
| Acronym | Definition |
|---|---|
| PGSU | Post Graduate Students' Union (India) |
| PGSU | Primorsko Goranska Stranka Umirovljenika (Croatian: Primorje-Gorski Pensioners Party; Primorje-Gorski, Croatia) |
| PGSU | Private Guardian Support Unit (Australia) |
| PGSU | Procurement and General Services Unit (UN) |