THE GRAND ILLUSION by STYX has sold 3,100,000 copies in Canada and United States.
THE GRAND ILLUSION certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Canada |
100,000 | 1x Platinum | 1977 |
Canada Sales: 100,000
Certification / note: 1x Platinum
Certification Date / sales as of: 1977
|
 United States |
3,000,000 | 3x Platinum | 14 November, 1984 |
United States Sales: 3,000,000
Certification / note: 3x Platinum
Certification Date / sales as of: 14 November, 1984
|
| Total sales | 3,100,000 | (in 2 countries) |
Total
Sales: 3,100,000
(in 2 countries)
|
Year-end chart performance for THE GRAND ILLUSION
| Chart 1978 | Rank |
| Canadian Albums (RPM) |
14 |
| US Albums (Billboard 200) |
7 |