According to Billboard Issue 18.03.2006, Universal France, Blondie site, PARALLEL LINES by BLONDIE has sold 20,000,000 copies worldwide. The album sold best in United Kingdom (1,694,000 copies), United States (1,000,000 copies) and Canada (400,000 copies).
PARALLEL LINES certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Canada |
400,000 | 4x Platinum | 1980 |
Canada Sales: 400,000
Certification / note: 4x Platinum
Certification Date / sales as of: 1980
|
 Japan |
19,550 | Oricon charts |
Japan Sales: 19,550
Certification / note: Oricon charts
Certification Date / sales as of:
|
|
 Netherlands |
50,000 | 1x Gold | 1979 |
Netherlands Sales: 50,000
Certification / note: 1x Gold
Certification Date / sales as of: 1979
|
 New Zealand |
15,000 | 1x Platinum |
New Zealand Sales: 15,000
Certification / note: 1x Platinum
Certification Date / sales as of:
|
|
 United Kingdom |
1,694,000 | 1x Platinum | 6 February,1979 |
United Kingdom Sales: 1,694,000
Certification / note: 1x Platinum
Certification Date / sales as of: 6 February,1979
|
 United States |
1,000,000 | 1x Platinum | 6 June, 1979 |
United States Sales: 1,000,000
Certification / note: 1x Platinum
Certification Date / sales as of: 6 June, 1979
|
 Yugoslavia |
100,000 | 1x Platinum |
Yugoslavia Sales: 100,000
Certification / note: 1x Platinum
Certification Date / sales as of:
|
|
| Worldwide sales | 20,000,000 | Billboard Issue 18.03.2006, Universal France, Blondie site |
Total
Sales: 20,000,000
Source: Billboard Issue 18.03.2006, Universal France, Blondie site
|
Year-end chart performance for PARALLEL LINES
| Chart 1978 | Rank |
| Dutch Albums (Album Top 100) |
49 |
| UK Albums (Music Week) |
45 |
| Chart 1979 | Rank |
 Australian Albums (Kent Music Report) |
12 |
| Canadian Albums (RPM) |
27 |
 German Albums (Offizielle Top 100) |
17 |
| New Zealand Albums (RMNZ) |
9 |
| UK Albums (Music Week) |
1 |
| US Albums (Billboard 200) |
9 |
| Chart 1980 | Rank |
| UK Albums (Music Week) |
42 |
| US Albums (Billboard 200) |
40 |