The best selling album in 2015 in Ireland was 25 by ADELE.
| Rank | Artist | Album | Released |
| 1 | ADELE | 25 | 2015 |
| 2 | ED SHEERAN | X | 2014 |
| 3 | HOZIER | HOZIER | 2014 |
| 4 | JUSTIN BIEBER | PURPOSE | 2015 |
| 5 | NOW SERIES (UK) | NOW THAT'S WHAT I CALL MUSIC! 92 | 2015 |
| 6 | SAM SMITH | IN THE LONELY HOUR | 2014 |
| 7 | TAYLOR SWIFT | 1989 | 2014 |
| 8 | KODALINE | COMING UP FOR AIR | 2015 |
| 9 | NOW SERIES (UK) | NOW THAT'S WHAT I CALL MUSIC! 90 | 2015 |
| 10 | NATHAN CARTER | BEAUTIFUL LIFE AT CHRISTMAS | 2015 |
| 11 | NOW SERIES (UK) | NOW THAT'S WHAT I CALL MUSIC! 91 | 2015 |
| 12 | ONE DIRECTION | MADE IN THE A.M. | 2015 |
| 13 | VARIOUS ARTISTS | WHOLE LOTTA LIVE - TODAY FM SESSIONS | 2015 |
| 14 | ELVIS PRESLEY | IF I CAN DREAM: ELVIS PRESLEY WITH THE ROYAL PHILHARMONIC ORCHESTRA | 2015 |
| 15 | LITTLE MIX | GET WEIRD | 2015 |
| 16 | COLDPLAY | A HEAD FULL OF DREAMS | 2015 |
| 17 | FLORENCE + THE MACHINE | HOW BIG, HOW BLUE, HOW BEAUTIFUL | 2015 |
| 18 | JAMES BAY | CHAOS AND THE CALM | 2015 |
| 19 | GEORGE EZRA | WANTED ON VOYAGE | 2014 |
| 20 | ED SHEERAN | + | 2011 |
Source: IRMA