According to Rhino, TRIO by DOLLY PARTON, EMMYLOU HARRIS & LINDA RONSTADT has sold 4,000,000 copies worldwide. The album sold best in United States (1,000,000 copies), New Zealand (7,500 copies) and (0 copies).
TRIO certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 New Zealand |
7,500 | 1x Gold |
New Zealand Sales: 7,500
Certification / note: 1x Gold
Certification Date / sales as of:
|
|
 United States |
1,000,000 | 1x Platinum | 14 July, 1987 |
United States Sales: 1,000,000
Certification / note: 1x Platinum
Certification Date / sales as of: 14 July, 1987
|
| Worldwide sales | 4,000,000 | Rhino |
Total
Sales: 4,000,000
Source: Rhino
|
Year-end chart performance for TRIO
| Chart 1987 | Rank |
 Canadian Albums (RPM) |
29 |
| New Zealand Albums (RMNZ) |
43 |
| US Albums (Billboard 200) |
62 |