The best selling album in 1999 in Portugal was SOGNO by ANDREA BOCELLI.
| Rank | Artist | Album | Released |
| 1 | ANDREA BOCELLI | SOGNO | 1999 |
| 2 | VENGABOYS | THE PARTY ALBUM | 1999 |
| 3 | ABBA | LOVE STORIES | 1999 |
| 4 | CHER | BELIEVE | 1998 |
| 5 | BACKSTREET BOYS | MILLENNIUM | 1999 |
| 6 | SCORPIONS | BEST | 1999 |
| 7 | SANTOS & PECADORES | VOAR | 1999 |
| 8 | BRITNEY SPEARS | BABY ONE MORE TIME | 1999 |
| 9 | LOU BEGA | A LITTLE BIT OF MAMBO | 1999 |
| 10 | ALEJANDRO SANZ | MÁS | 1997 |
Source: AFP