WESA
| Acronym | Definition |
|---|---|
| WESA | Water and Earth Science Associates (Canada) |
| WESA | Western Sandpiper (bird species Calidris mauri) |
| WESA | Western and English Sales Association (Denver, CO) |
| WESA | Water Employee Services Authority (California) |
| WESA | Wapeneienaars van Suid-Afrika (Afrikaans: Gun Owners of South Africa) |
| WESA | Welfare Support Assistance |