The best-selling album of 2015 in United States is 25 by ADELE which sold 8,008,000 copies.
Rank Artist Album Sales Released
1
ADELE
25
8,008,000
2015
2
TAYLOR SWIFT
1989
3,105,000
2014
3
JUSTIN BIEBER
PURPOSE
2,225,000
2015
4
ED SHEERAN
X
2,206,000
2014
5
THE WEEKND
BEAUTY BEHIND THE MADNESS
2,045,000
2015
6
DRAKE
IF YOU'RE READING THIS ITS TOO LATE
1,919,000
2015
7
MEGHAN TRAINOR
TITLE
1,795,000
2015
8
SAM SMITH
IN THE LONELY HOUR
1,741,000
2014
9
SAM HUNT
MONTEVALLO
1,378,000
2014
10
FETTY WAP
FETTY WAP
1,295,000
2015
Source: Nielsen SoundScan