These K-pop groups are the kings and queens of album sales! In April 2018, South Korean albums surpassing 250,000 sales were being certified in accordance with Korea Music Content Association certification levels. 

The certification levels are categorized into five: Platinum-250,000 units, 2x Platinum-500,000 units, 3x Platinum-750,000 units, Million-1,000,000 units, and 2x Million-2,000 units.

Among several K-pop groups who released their albums from 2018 to 2020, these K-pop groups are the only idol groups who were given certifications for their excellent records and sales.

NCT (7 Certified Albums)

(Photo : SM Entertainment)

In 2018, NCT got their first Platinum-certified album after releasing, "NCT 2018 Empathy." Its sub-units, NCT 127 and NCT Dream also recorded several platinum certifications to 2x Platinum certifications. 

NCT 127 (4)

(Photo : SM Entertainment)

• Platinum: Regular-Irregular (2018)
• Platinum: We Are Superhuman (2019)
• 3x Platinum: Neo Zone (2020)
• 2x Platinum: Neo Zone the Final Round (2020)- yet to be certified as Million

NCT Dream (2)

(Photo : SM Entertainment)

•   Platinum: We Boom (2019)
• 2x Platinum: Reload (2020) 

TWICE (6 Certified-Albums)

(Photo : JYP Entertainment)

In 2018, TWICE became the first-ever girl group to have a Platinum-certified album after the release of "What is Love?". They also hold the record of the female group with the most certified-albums. 

• Platinum: What is Love? (2018)
• Platinum: Summer Nights (2018)
• Platinum: Yes or Yes (Release in 2019, certified in 2020)
• Platinum: Fancy You (2019)
• Platinum: Feel Special (2019)
• 2x Platinum: More and More (2020)

GOT7 (5 Certified-Albums)

(Photo : GOT7 Twitter)

The K-pop group GOT7 is the first-ever idol group to have a certified album after releasing their album, "Eyes on You," on March 2018. They received a platinum award, after having certified sales of 250,000. 

Currently, GOT7 has five platinum albums, including:

• Eyes on You (2018)
• Present You (2018)
• Spinning Top (2019)
• Call My Name (Released in 2019, certified in 2020)
• Dye (2020)

BTS (5 Certified-Albums)

(Photo : Big Hit)

In 2018, BTS became the first K-pop group to achieve a 2x Million certification with their release, "Love Yourself: Answer." The global boyband is also the first group to set a record of 3x Million and 4x Million certification. 

• 2x Platinum: BTS World: Original Soundtrack (2019)
• 2x Million: Love Yourself 結 Answer (2018)
• Love Yourself 轉 'Tear' (Released in 2018, certified in 2019)
• 3x Million: Map of the Soul: Persona (2019)
• 4x Million: Map of the Soul: 7 (2020)

EXO (5 Certified-Albums)

(Photo : SM Entertainment)

Top K-pop group EXO currently have three certified albums, while EXO-SC, their sub-unit, have two certified albums as well.

• 2x Platinum: Love Shot (Released in 2018, Certified in 2019)
• 3x Platinum: Obsession (Released in 2019, Certified in 2020)
• Million: Don't Mess Up My Tempo (Released in 2018, Certified in 2019)

EXO-SC

(Photo : SM Entertainment)

•        Platinum: Blooming Days (2018)
•        Platinum: What a Life (2019)

SEVENTEEN (4 Certified-Albums)

(Photo : Pledis Entertainment)

SEVENTEEN is the first K-pop group to have a million certified album this 2020, with their latest album. "Heng:garæ."

• Platinum: You Make My Day (2018)
• Platinum: You Made My Dawn (2019)
• 3x Platinum: An Ode (2019)
• Million: Heng:garæ (2020)

WANNA ONE (3 Certified-Albums)

(Photo : Pinterest)

Wanna One, the first K-pop group to achieve a 3x Platinum album with their "0+1꞊1 (I Promise You)."

•  2x Platinum: 1÷x=1 (Undivided) (2018)
•                        1÷x=1 (Undivided) (Released in 2018, Certified in 2019)
• 3x Platinum: 0+1꞊1 (I Promise You) (2018)

IZ*ONE (3 Certified-Albums)

(Photo : IZ*ONE SNS)

• Platinum: Heart*Iz (2019)
• Bloom*Iz (2020)
• Color*Iz (Released in 2018, Certified in 2020)

BLACKPINK (2 Certified-Albums)

(Photo : BLACKPINK Twitter)

• Platinum: Square Up (2019)
• Platinum: KILL THIS LOVE (2019)

MONSTA X (2 Certified-Albums)

(Photo : MONSTA X SNS)

• Platinum: Take.2 We Are Here (2019)
• Platinum: Fantasia X (2019)

NU'EST (2 Certified-Albums)

(Photo : ARENA)

• Platinum: Happily Ever After (2019)

NU'EST W

• Platinum: Who You (2018)

STRAY KIDS (1 Certified-Album)

(Photo : JYP Entertainment)

• Platinum: Go生 (2020)

TXT (1 Certified Album)

(Photo : Big Hit)

• Platinum: The Dream Chapter: Eternity (2020)

Super Junior (1 Certified Album)

(Photo : SJ Label)

• Platinum: Time Slip (2019)

X1 (1 Certified Album)

(Photo : Pinterest)

• 2x Platinum: Quantum Leap (2019)

Meanwhile, Suho, Baekhyun, and Kang Daniel are the only K-pop solo artists with certified albums.