PTCO
| Acronym | Definition |
|---|---|
| PTCO | Parent Teacher Counselor Organization (Indiana School for the Deaf; Indianapolis, IN) |
| PTCO | Parent Teacher Community Organization |
| PTCO | Pemberton Tramway Company Pty Ltd (Australia) |
| PTCO | Pokemon Trading Cards Online |
| PTCO | Parent-Teacher-Child Organization |
| PTCO | Patent, Trademark and Copyright Office (various locations) |
| PTCO | Port Townsend Community Orchestra (Port Townsend, WA) |