INFEST by PAPA ROACH has sold 4,207,500 copies in 32 countries. The album sold best in United States (3,000,000 copies), Canada (200,000 copies) and United Kingdom (100,000 copies).
INFEST certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Austria |
25,000 | 1x Gold | 1 February, 2001 |
Austria Sales: 25,000
Certification / note: 1x Gold
Certification Date / sales as of: 1 February, 2001
|
 Canada |
200,000 | 2x Platinum | 2000 |
Canada Sales: 200,000
Certification / note: 2x Platinum
Certification Date / sales as of: 2000
|
 New Zealand |
7,500 | 1x Gold |
New Zealand Sales: 7,500
Certification / note: 1x Gold
Certification Date / sales as of:
|
|
 Switzerland |
25,000 | 1x Gold | 2001 |
Switzerland Sales: 25,000
Certification / note: 1x Gold
Certification Date / sales as of: 2001
|
 United Kingdom |
100,000 | 1x Gold | 27 April, 2001 |
United Kingdom Sales: 100,000
Certification / note: 1x Gold
Certification Date / sales as of: 27 April, 2001
|
 United States |
3,000,000 | 3x Platinum | 18 July, 2001 |
United States Sales: 3,000,000
Certification / note: 3x Platinum
Certification Date / sales as of: 18 July, 2001
|
 Europe (IFPI) |
1,000,000 | 1x Platinum | 2010 |
Europe (IFPI) Sales: 1,000,000
Certification / note: 1x Platinum
Certification Date / sales as of: 2010
|
| Total sales | 4,207,500 | (in 32 countries) |
Total
Sales: 4,207,500
(in 32 countries)
|
Year-end chart performance for INFEST
| Chart 2000 | Rank | Sales |
| Canadian Albums (SoundScan) |
43 | |
| US Albums (Billboard 200) |
27 | |
| US Albums (Soundscan) |
20 | 2,707,954 |
| Chart 2001 | Rank | Sales |
 Belgian Albums (Ultratop Flanders) |
28 | |
| Canadian Albums (SoundScan) |
142 | |
 European Albums (Music & Media) |
59 | |
 German Albums (Offizielle Top 100) |
64 | |
| Swiss Albums (Schweizer Hitparade) |
90 | |
| UK Albums |
73 | 280,000 |
| UK Artist Albums |
59 | 280,000 |
| US Albums (Billboard 200) |
116 |