20 GREATEST HITS by SIMON & GARFUNKEL has sold 50,000 copies in Australia and New Zealand.
20 GREATEST HITS certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Australia |
35,000 | 1x Gold | MAY 1991 |
Australia Sales: 35,000
Certification / note: 1x Gold
Certification Date / sales as of: MAY 1991
|
 New Zealand |
15,000 | 1x Platinum |
New Zealand Sales: 15,000
Certification / note: 1x Platinum
Certification Date / sales as of:
|
|
| Total sales | 50,000 | (in 2 countries) |
Total
Sales: 50,000
(in 2 countries)
|
Year-end chart performance for 20 GREATEST HITS
| Chart 1991 | Rank |
| New Zealand Albums (RMNZ) |
15 |